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Conversion to Judaism (Hebrew: גיור, giyur) is a religious act when, after a period of study and immersion into Jewish life overseen by a rabbi, a religious panel formally determines that a non-Jewish person has met the requirements for conversion to Judaism by demonstrating a sincere commitment to Jewish beliefs and practices and acceptance of the Jewish community, culture, and history. A formal conversion is also sometimes undertaken by individuals whose Jewish ancestry is questioned or by people who were raised Jewish, but may not actually be considered Jews according to traditional Jewish law.
The procedure and requirements for conversion depend on the sponsoring denomination. A conversion in accordance with the process of a denomination is not a guarantee of recognition by another denomination.
In some cases, a person may forgo a formal conversion to Judaism and adopt some or all beliefs and practices of Judaism. However, without a formal conversion, many highly observant Jews will reject a convert's Jewish status.
There are some groups that have adopted Jewish customs and practices. For example, in Russia the Subbotniks have adopted most aspects of Judaism without formal conversion to Judaism. However, if Subbotniks, or anyone without a formal conversion, wish to marry into a traditional Jewish community or immigrate to Israel, they must have a formal conversion.
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A male convert to Judaism is referred to by the Hebrew word ger (Hebrew: גר, plural gerim) and a female convert is a giyoret. The word is rendered by the Greek "proselyte" as used in the Septuagint to denote a "stranger." In Karaite Judaism a Ger is a non-Jew who has yet to fully convert to Judaism. After a Ger converts to Judaism, they are no longer considered a Ger but a full-fledged Jew.
The Jews were not converts in Egypt, but rather foreigners. Another passage which may be relevant to a process of conversion involves non-Jewish women captured in war who could be adopted forcibly as wives (Deuteronomy 21:10–14). Another verse which has been interpreted as referring to non-Jews converting to Judaism is Esther 8:17, although no process is described. (Esther 8:17).
In the Talmud, "ger" is used in two senses: ger tzedek refers to a "righteous convert", a proselyte to Judaism, and ger toshav, a non-Jewish inhabitant of the Land of Israel who observes the Seven Laws of Noah and has repudiated all links with idolatry. In Modern Hebrew, ger refers to a convert to Judaism.
According to Maimonides, (Isurei Biah 13:14) converts were accepted since the beginning of Jewish history, and the foreign wives of Jewish leaders - such as Samson and Solomon - were converts. Yet he says (Isurei Biah 13:15), that in the times of Jewish political power, such as the days of Kings David and Solomon, Batei Dinim (Jewish courts) did not accept converts, who may have not had the right intention, and they had to wait and prove their intentions to be legally accepted.
Nowadays, with the notable exception of some Syrian Jewish communities, (primarily the Brooklyn, NY and Deal, NJ communities), all mainstream forms of Judaism today are open to sincere converts, with all denominations accepting converts converted by their denominations. The rules vary between denominations.
For Rabbinic Judaism, the laws governing conversion (gerut) are based on codes of law and texts, including discussions in the Talmud, through the Shulkhan Arukh and subsequent interpretations. (Many of the guidelines of accepting converts are based on the Book of Ruth and the manner whereby Ruth was brought into the fold through her mother-in-law, Naomi). These rules are held as authoritative by Orthodox Judaism and Conservative Judaism. Jewish law is generally interpreted as somewhat discouraging proselytizing, and religious gerut is also somewhat discouraged. In the past, rabbis often rejected potential converts three times, and if they remained adamant in their desire to convert, they would then allow them to begin the process.
However, a rabbi convinced of the prospective convert's sincerity may allow him or her to follow the process of conversion. This requires the person to appear before an established three-judge Jewish religious court known as a beth din ("religious court") to be tested and formally accepted. A person who formally converts to Judaism under the auspices of a halakhically constituted and recognized beth din consisting preferably of three learned rabbis acting as dayanim ("judges"), but also possibly two learned and respected lay members of the community along with a rabbi, is issued with a Shtar geirut ("Certificate of Conversion").
Conservative Judaism takes a more lenient approach in application of the halakhic rules than Modern Orthodox Judaism. Its approach to the validity of conversions is based on whether the conversion procedure followed rabbinic norms, rather than the reliability of those performing it or the nature of the obligations the convert undertook. Accordingly, it may accept the validity of some Reform and Reconstructionist conversions, but only if they include immersion in a ritual bath (mikvah), appearance before a rabbinical court (beit din) and, for men, circumcision (brit milah) or a symbolic circumcision for those already circumcised (hatafat dam brit).
The requirements of Reform Judaism for conversions are different. The denomination states that "people considering conversion are expected to study Jewish theology, rituals, history, culture and customs, and to begin incorporating Jewish practices into their lives. The length and format of the course of study will vary from rabbi to rabbi and community to community, though most now require a course in basic Judaism and individual study with a rabbi, as well as attendance at services and participation in home practice and synagogue life."
Although an infant conversion might be accepted in some circumstances (such as in the case of adopted children or children whose parents convert), children who convert would typically be asked if they want to remain Jewish after reaching religious adulthood – which is 12 years of age for a girl and 13 for a boy. This standard is applied by Orthodox and Conservative Judaism, which accept halakha as binding.
Reconstructionist Judaism values the symbolism of the conversion ritual, and encourages those who were not born of Jewish parents and who wish to convert to undergo this rite of passage. The Reconstructionist course of study for a prospective convert, which is determined by the rabbi and congregation the individual is working with, includes history, observance and beliefs, and learning how to make educated choices. The completion of the process is marked by ritual immersion for men and women; circumcision or hatafat dam brit (symbolic drop of blood) for men (unless there exists an extraordinary physical or emotional hazard); a Bet Din (a dialogue with three knowledgeable Jews, at least one of whom is a rabbi), and often a public welcoming ceremony.
Karaite Judaism does not accept Rabbinic Judaism and has different requirements for conversion. Traditionally non-proselytizing, Karaite Judaism's long standing abstention from conversions was recently lifted. On 1 August 2007, the Karaites reportedly converted their first new members in 500 years. At a ceremony in their Northern California synagogue, ten adults and four minors swore fealty to Judaism after completing a year of study. This conversion comes 15 years after the Karaite Council of Sages reversed its centuries-old ban on accepting converts.
The Amora'im who produced the Talmud set out three requirements for a conversion to Judaism (Keritot 8b), which must be witnessed and affirmed by a beth din hedyot rabbinical court composed of three Jewish males above the age of thirteen (they do not need to be rabbis):[original research?]
The consensus of halakhic authorities also requires a convert to understand and accept the duties of the classical Jewish law. This is not stated explicitly in the Talmud, but was inferred by subsequent commentators.
After confirming that all these requirements have been met, the beth din issues a "Certificate of Conversion" (Shtar Giur), certifying that the person is now a Jew.
According to the Jewish Encyclopedia article on circumcision of proselytes, in the 1st century CE, before the Mishnah was edited, the requirement for circumcision of proselytes was an open issue between the zealots and liberal parties in ancient Israel. R. Joshua argued that besides accepting Jewish beliefs and laws, a prospective convert to Judaism must undergo immersion in a mikveh. In contrast, R. Eliezer makes circumcision a condition for the conversion. A similar controversy between the Shammaites and the Hillelites is given regarding a proselyte born without a foreskin: the former demanding the spilling of a drop of blood symbolic of the Brit Milah, thereby entering into the covenant; the latter declaring it to be unnecessary.
In discussions about the necessity of circumcision for those born of a Jewish mother, lending some support to the need for circumcision of converts, the Midrash states: "If thy sons accept My Godhead [by undergoing circumcision] I shall be their God and bring them into the land; but if they do not observe My covenant in regard either to circumcision or to the Sabbath, they shall not enter the land of promise" (Midrash Genesis Rabbah xlvi). "The Sabbath-keepers who are not circumcised are intruders, and deserve punishment," (Midrash Deut. Rabbah i).
Flavius Josephus in Jewish Antiquities Book 20 Chapter 2 recorded the story of King Izates of Adiabene who decided to follow the Law of Moses at the advice of a Jewish merchant named Ananias. He was going to get circumcised, but his mother, Helen, who herself embraced the Jewish customs, advised against it on the grounds that the subjects would not stand to be ruled by someone who followed such "strange and foreign rites". Ananias likewise advised against it, on the grounds that worship of God was superior to circumcision (Robert Eisenman in James the Brother of Jesus claims that Ananias is Paul of Tarsus who held similar views, although this is a novel interpretation lacking support in mainstream scholarship) and that God would forgive him for fear of his subjects. So Izates decided against it. However, later, "a certain other Jew that came out of Galilee, whose name was Eleazar", who was well versed in the Law, convinced him that he should, on the grounds that it was one thing to read the Law and another thing to practice it, and so he did. Once Helen and Ananias found out, they were struck by great fear of the possible consequences, but as Josephus put it, God looked after Izates. As his reign was peaceful and blessed, Helen visited the Jerusalem Temple to thank God, and since there was a terrible famine at the time, she brought lots of food and aid to the people of Jerusalem.
The requirements for conversions vary somewhat within the different branches of Judaism, so whether or not a conversion is recognized by another denomination is often an issue fraught with religious politics. The Orthodox rejection of non-Orthodox conversions is derived less from qualms with the conversion process itself, since Conservative and even some Reform conversions are ostensibly very similar to Orthodox conversions with respect to duration and content, but rather from that the convert was presumably not properly (i.e. according to tradition) instructed in Jewish Law, and the procedure of conversion has a chance of not having been done properly, and that those overseeing the process were (almost certainly) not qualified to test the convert (and in any case would have had different answers).[original research?]
In general, immersion in the mikveh is an important part of a traditional conversion. If the person who is converting is male, circumcision is a part of the traditional conversion process as well. If the male who is converting has already been circumcised, then a ritual removal of a single drop of blood will take place (hatafat dam brit). However, more liberal branches of Judaism have a more relaxed requirement of immersion and circumcision.
Someone who was converted to Judaism as a child has an option of rejecting this after reaching the age of maturity, which in Judaism is age twelve for girls or thirteen for boys.
In the United States of America, Reform Judaism rejects the concept that any rules or rituals should be considered necessary for conversion to Judaism. In the late 19th century, the Central Conference of American Rabbis, the official body of American Reform rabbis, formally resolved to permit the admission of converts "without any initiatory rite, ceremony, or observance whatsoever." (CCAR Yearbook 3 (1893), 73–95; American Reform Responsa (ARR), no. 68, at 236–237.)
Although this resolution has often been examined critically by many Reform rabbis, the resolution still remains the official policy of American Reform Judaism (CCAR Responsa "Circumcision for an Eight-Year-Old Convert" 5756.13 and Solomon Freehof, Reform Responsa for Our Time, no. 15.) Thus, American Reform Judaism does not require ritual immersion in a mikveh, circumcision, or acceptance of mitzvot as normative. Appearance before a Bet Din is recommended, but is not considered necessary. Converts are asked to commit to religious standards set by the local Reform community.
In actual practice, the requirements for conversion of any individual are determined by the Rabbi who sponsors the convert. Typically, Reform Rabbis require prospective converts to take a course of study in Judaism, such as an "Introduction to Judaism" course, to participate in worship at a synagogue, and to live as a Jew (however that is interpreted by the individual Rabbi) for a period of time. A period of one year is common, although individual Rabbis' requirements vary. When the sponsoring Rabbi feels that the candidate is ready, a Bet Din may be convened. Other rituals such as immersion in a mikvah, circumcision (or Hatafat dam brit), and a public ceremony to celebrate the conversion, are also at the discretion of the Rabbi.
In response to the tremendous variations that exist within the Reform community, the Conservative Jewish movement attempted to set a nuanced approach. The Conservative Committee on Jewish Law and Standards has issued a legal opinion stating that Reform conversions may be accepted as valid only when they include the minimal Conservative halachic requirements of milah and t'vilah, appearance before a Conservative Bet Din, and a course of Conservative study. (Proceedings of Committee on Jewish Law and Standards: 1980–1985, pp. 77–101.)
In general, branches of Orthodox Judaism consider non-Orthodox conversions either inadequate or of questionable halachic compliance, and such conversions are therefore not accepted by these branches of Judaism. Conversely, both Conservative and Reform Judaism accept the stringent Orthodox conversion process as being valid. Since 2008, Haredi Orthodox religious courts in Israel have been rejecting conversions from some other Orthodox rabbis, in addition to Reform and Conservative conversions, as not being stringent enough.
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In 2008, a Haredi-dominated Badatz in Israel annulled thousands of conversions performed by the Military Rabbinate in Israel. The Chief Rabbinate of Israel, which is the only state-recognized authority on religious matters, backed by Rabbi Ovadia Yosef, ruled against this, making it legally invalid for purposes of Israeli law. The last ruling means those converts will have no problem from authorities in Israel in regard to their Jewish status.
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There are two orthodox conversion programmes in Montreal. One is made up of a Bet Din (Jewish Court) of congregational member rabbis from the Rabbinical Council of America, Montreal region (RCA). This program provides a way to convert according to the rigorous rules of Halachah while making the process more "user friendly" for non-Jewish individuals seeking a more "hands-on" or "modern Orthodox" approach. The second program is supervised by the Jewish Community Council of Montreal, the Vaad Hair.
All conversion candidates—who could include singles, non-Jewish couples and adoption cases—must have a sponsoring rabbi and undergo a rigorous screening process. Conversions stemming from both programs are recognized in Israel and around the world.
As of 2006, the Moetzet Hakhamim (Council of Sages) began to accept converts to Karaite Judaism through the Karaite Jewish University. The process requires one year of learning, circumcision (for males), and the taking of the vow that Ruth took.
כִּי אֶל-אֲשֶׁר תֵּלְכִי אֵלֵךְ, וּבַאֲשֶׁר תָּלִינִי אָלִין—עַמֵּךְ עַמִּי, וֵאלֹהַיִךְ אֱלֹהָי. בַּאֲשֶׁר תָּמוּתִי אָמוּת, וְשָׁם אֶקָּבֵר; כֹּה יַעֲשֶׂה יְהוָה לִי, וְכֹה יוֹסִיף—כִּי הַמָּוֶת, יַפְרִיד בֵּינִי וּבֵינֵךְ.
"For whither thou goest, I will go; and where thou lodgest, I will lodge; thy people shall be my people, and thy God my God; where thou diest, will I die, and there will I be buried; the LORD do so to me, and more also, if aught but death part thee and me." Ruth 1:16-17
In the 1950s Rabbi Joseph Soloveitchik and other members of the Rabbinical Council of America engaged in a series of private negotiations with the leaders of Conservative Judaism's Rabbinical Assembly, including Saul Lieberman; their goal was to create a joint Orthodox-Conservative national beth din for all Jews in the United States. It would create communal standards of marriage and divorce. It was to be modeled after the Israeli Chief Rabbinate, where all the judges would have been Orthodox, while it would have been accepted by the larger Conservative movement as legitimate. Conservative rabbis in the Rabbinical Assembly created a Joint Conference on Jewish Law, devoting a year to this effort.
For a number of reasons, the project did not succeed. According to Orthodox Rabbi Louis Bernstein, the major reason for its failure was the Orthodox rabbis' insistence that the Conservative Rabbinical Assembly agree to expel Conservative rabbis for actions they took prior to the formation of the new beth din, and the RA refused to do so. According to Orthodox Rabbi Emanuel Rackman, former president of the RCA, the major reason for its failure was pressure from haredi Orthodox rabbis, who held that any cooperation between Orthodoxy and Conservatism was forbidden. In 1956, Rabbi Harry Halpern, of the Joint Conference wrote a report on the demise of this beth din. He writes that negotiations between the Orthodox and Conservative denominations were completed and agreed upon, but then a new requirement was demanded by the RCA: The RA must "impose severe sanctions" upon Conservative rabbis for actions they took before this new beth din was formed. Halpern writes that the RA "could not assent to rigorously disciplining our members at the behest of an outside group". He goes on to write that although subsequent efforts were made to cooperate with the Orthodox, a letter from eleven Rosh Yeshivas was circulated declaring that Orthodox rabbis are forbidden to cooperate with Conservative rabbis.
In Denver, Colorado, a joint Orthodox, Traditional, Conservative and Reform Bet Din was formed to promote uniform standards for conversion to Judaism. A number of rabbis were Orthodox and had semicha from Orthodox yeshivas, but were serving in synagogues without a mechitza; these synagogues were called traditional Judaism. Over a five-year period they performed some 750 conversions to Judaism. However, in 1983 the joint Beth Din was dissolved, due to the unilateral American Reform Jewish decision to change the definition of Jewishness.
The move was precipitated by the resolution on patrilineality adopted that year by the Central Conference of American Rabbis. This decision to redefine Jewish identity, as well as the designation of Denver as a pilot community for a new Reform out reach effort to recruit converts, convinced the Traditional and Conservative rabbis that they could no longer participate in the joint board...the national decision of the Reform rabbinate placed the Traditional and Conservative rabbis in an untenable position. They could not cooperate in a conversion program with rabbis who held so different a conception of Jewish identity. And furthermore, they could not supervise conversions that would occur with increasing frequency due to a Reform outreach effort that was inconsistent with their own understanding of how to relate to potential proselytes.— Wertheimer, A People Divided, 
Specifically, in 1983, the Central Conference of American Rabbis passed a resolution waiving the need for formal conversion for anyone with at least one Jewish parent who has made affirmative acts of Jewish identity. This departed from the traditional position requiring formal conversion to Judaism for children without a Jewish mother. The 1983 resolution of the American Reform movement has had a mixed reception in Reform Jewish communities outside of the United States. Most notably, the Israel Movement for Progressive Judaism has rejected patrilineal descent and requires formal conversion for anyone without a Jewish mother. However, in 2015 the majority of Britain's Assembly of Reform Rabbis voted in favor of a position paper proposing "that individuals who live a Jewish life, and who are patrilineally Jewish, can be welcomed into the Jewish community and confirmed as Jewish through an individual process." Britain's Assembly of Reform Rabbis stated that rabbis "would be able to take local decisions – ratified by the Beit Din – confirming Jewish status."
The end of the joint Beth Din program was welcomed by Haredi Orthodox groups, who saw the program as illegitimate. Further, Haredi groups attempted to prevent non-Orthodox rabbis from following the traditional requirements of converts using a mikvah. In the Haredi view, it is better to have no conversion at all than a non-Orthodox conversion, as all non-Orthodox conversions are not true conversions at all according to them.
In the 1980s Orthodox Rabbi Norman Lamm, Rosh Yeshiva of Yeshiva University, along with other American and Israeli Orthodox rabbis, worked with Conservative and Reform rabbis to come up with solution to the "Who is a Jew?" issue. In 1989 and 1990 Israeli Prime Minister Yitzhak Shamir spearheaded an effort to create a solution to the "Who is a Jew?" issue.
A plan was developed by Israeli Cabinet Secretary Elyakim Rubenstein, who negotiated secretly for many months with rabbis from Conservative, Reform and Orthodox Judaism, including faculty at Yeshiva University, with Lamm as Rosh Yeshiva. They were planning to create a joint panel that interviewed people who were converting to Judaism and considering making aliyah (moving to the State of Israel), and would refer them to a beth din that would convert the candidate following traditional halakha. All negotiating parties came to agreement:
Many Reform rabbis took offense at the notion that the beth din must be strictly halakhic and Orthodox, but they acquiesced. However, when word about this project became public, a number of leading haredi rabbis issued a statement denouncing the project, condemning it as a "travesty of halakha". Rabbi Moshe Sherer, Chairman of Agudath Israel World Organization, stated that "Yes we played a role in putting an end to that farce, and I'm proud we did". Norman Lamm condemned this interference by Sherer, stating that this was "the most damaging thing that he [Sherer] ever did in his forty year career".
Rabbi Lamm wanted this to be only the beginning of a solution to Jewish disunity. He stated that had this unified conversion plan not been destroyed, he wanted to extend this program to the area of halakhic Jewish divorces, thus ending the problem of mamzerut.
In 1997 the issue of "Who is a Jew?" again arose in the State of Israel, and Orthodox leaders such as Rabbi Norman Lamm publicly backed the Neeman commission, a group of Orthodox, Conservative and Reform rabbis working to develop joint programs for conversion to Judaism. In 1997 Lamm gave a speech at the World Council of Orthodox Leadership, in Glen Springs, N.Y., urging Orthodox Jews to support this effort.
Lamm told his listeners that they should value and encourage the efforts of non-Orthodox leaders to more seriously integrate traditional Jewish practices into the lives of their followers. They should welcome the creation of Reform and Conservative day schools and not see them as a threat to their own, Lamm said. In many communities, Orthodox day schools, or Orthodox-oriented community day schools, have large numbers of students from non-Orthodox families. The liberal movements should be appreciated and encouraged because they are doing something Jewish, even if it is not the way that Orthodox Jews would like them to, he said. "What they are doing is something, and something is better than nothing," he said in his speech. "I'm very openly attacking the notion that we sometimes find in the Orthodox community that 'being a goy is better'" than being a non-Orthodox Jew, he said in an interview.
A recent development has been the concept of annulling conversions to Judaism, sometimes many years after they have taken place, due to a reduction in religious observance or change of community by the convert. This is unknown in rabbinic literature, where conversion is considered irreversible. Chuck Davidson, a Modern Orthodox expert on this conversion crisis explains "From the Middle Ages onwards, the greatest of the rabbis wrote explicitly that even if immediately after the conversion the convert goes off to worship idols, the person is still considered Jewish". The justification given for the change in approach is that the original conversion must never have been valid in the first place as it is clear from the convert's subsequent actions they were insincere at the time of conversion.
A situation of confusion and instability in Jewish identity in Israel was made worse when Haredi Rabbi Avraham Sherman of Israel's supreme religious court called into question the validity of over 40,000 Jewish conversions when he upheld a ruling by the Ashdod Rabbinical Court to retroactively annul the conversion of a woman who came before them because in their eyes she failed to observe Jewish law (an orthodox lifestyle).
This crisis deepened, when Israel's Rabbinate called into question the validity of soldiers who had undergone conversion in the army, meaning a soldier killed in action could not be buried according to Jewish law. In 2010, the rabbinate created a further distrust in the conversion process when it began refusing to recognize orthodox converts from the United States as Jewish. Indeed, the great-niece of the renowned Zionist Nahum Sokolow was recently deemed "not Jewish enough" to marry in Israel, after she failed to prove the purity of Jewish blood for four generations.
Following a scandal in which U.S. Rabbi Barry Freundel was arrested on charges of installing hidden cameras in a mikvah to film women converts undressing, the Israeli Chief Rabbinate said it would review the validity of all past conversions performed by Freundel, then quickly reversed its decision, clarifying that it was joining the Orthodox Rabbinical Council of America in affirming the validity of the conversions.
In December 2014 an Israeli court decided that a conversion could be annulled. In his decision Justice Neal Hendel wrote: "Just as the civil court has the inalienable authority to reverse — in extremely rare cases — a final judgment, so too does the special religious conversion court. For otherwise, we would allow for judgments that are flawed from their inception to exist eternally." 
Once undergone, a valid religious conversion to Judaism cannot be overturned. However, a Beth Din may determine that the conversion is void as it was never undertaken correctly in the first place. For example, if the rite of mikveh was performed incorrectly. In recent years many Orthodox conversions have been overturned. In 2008 Israel's highest religious court invalidated the conversion of 40,000 Jews, mostly from Russian immigrant families, even though they had been approved by an Orthodox rabbi. Debate on what constitutes a valid Beth Din for conversion and for annulling conversions has caused divisions in the Orthodox world. It is an implicit judgement on the character and uprightness of the rabbis in that religious court. For example, when Rabbi Barry Freundel was arrested on charges of voyeurism for filming women converts at the mikveh he supervised, Israel's Chief Rabbinate initially threatened to review and possibly invalidate the conversions Freundel had been involved in approving. A crisis between American and Israeli rabbis was averted when the Chief Rabbinate agreed that all conversions completed by Freundel would be considered valid.
Judaism is not currently an openly proselytizing religion. Judaism teaches that the righteous of all nations have a place in the afterlife. Much like in the other Abrahamic faiths, Jewish law requires the sincerity of a potential convert, but takes it to a much more serious and formal level. In view of the foregoing considerations, most authorities are very careful about it. Essentially, they want to be sure that the convert knows what he is getting into, and that he is doing it for sincerely religious reasons. However, while conversion for the sake of love for Judaism is considered the best motivation, a conversion for the sake of avoiding intermarriage is gaining acceptance, also.
There is a tradition that a prospective convert should be turned away three times as a test of sincerity, though most rabbis no longer follow the tradition. Neither the Rabbinical Council of America nor the Rabbinical Assembly, the leading American Orthodox and Conservative organizations, suggest taking this action in their conversion policies, with the Central Conference of American Rabbis (CCAR) and Union for Reform Judaism (URJ) actively opposing its practice.
Halakha forbids the mistreatment of a convert, including reminding a convert that he or she was once not a Jew. Hence, little to no distinction is made in Judaism between those who are born Jewish and those who are Jewish as a result of conversion. However, despite Halakha protecting the rights of converts, some Jewish communities have been accused of treating converts as second-class Jews. For example, many communities of Syrian Jews have banned conversion and refuse to recognise any Jewish conversion, including those done under Orthodox auspices (possibly influenced by sects in Syria like the Druze which do not accept converts).
According to Orthodox interpretations of Halakha, converts face a limited number of restrictions. A marriage between a female convert and a kohen (members of the priestly class) is prohibited and any children of the union do not inherit their father's kohen status. While a Jew by birth may not marry a mamzer, a convert can. Converts can become rabbis. For instance, Rabbi Meir Baal Ha Nes is thought to be a descendant of a proselyte. Rabbi Akiva was also a very well known son of converts. The Talmud lists many of the Jewish nation's greatest leaders who had either descended from or were themselves converts. In fact, King David is descended from Ruth, a convert to Judaism.(Ruth 4:13–22) In Orthodox and Conservative communities which maintain tribal distinctions, converts become Yisraelim (Israelites), ordinary Jews with no tribal or inter-Jewish distinctions. Converts typically follow the customs of their congregations. So a convert who prays at a Sephardi synagogue would follow Sephardi customs and learn Sephardi Hebrew.
A convert chooses his or her own Hebrew first name upon conversion but is traditionally known as the son or daughter of Abraham and Sarah, the first patriarch and matriarch in the Torah, often with the additional qualifier of "Avinu" (our father) and "Imenu" (our mother). Hence, a convert named Akiva would be known, for ritual purposes in a synagogue, as "Akiva ben Avraham Avinu"; in cases where the mother's name is used, such as for the prayer for recovery from an illness, he would be known as "Akiva ben Sarah Imenu".
Talmudic opinions on converts are numerous; some positive, some negative. A quote from the Talmud labels the convert "Hard on Israel as a scab." Many interpretations explain this quote as meaning converts can be unobservant and lead Jews to be unobservant, or converts can be so observant that born Jews feel ashamed.
The term "Jew by choice" is often used to describe someone who, with no ancestral connection to the Jewish people, chose to convert to Judaism. It is often contrasted with such terms as "Jew by birth" (or "Jew by chance").
In recent decades, there has been a renewed Jewish conversion interest with some Bnei Anusim, that is, the descendants of Jews who were forced to convert to other faiths.
The category of Bnei Anusim (being Halachically non-Jews of Jewish descent) includes most numerously the Sephardic Bnei Anusim, that is, the descendants of those Sephardic Jews who were forced to convert to Christianity during the Spanish and Portuguese Inquisition. Although Bnei Anusim includes any other historical cases, including the Mashhadi Jews of Iran who were forced to convert to Islam, known as "Bnei Anusim Mashhad".
In the modern era, however, the most notable group are the mentioned Sephardic Bnei Anusim, who are found throughout Iberia (Spain and Portugal) and Iberoamerica (the Hispanic countries of the Americas plus Brazil). There has been a continuous steady growth among them who are now prospective converts, actively seeking conversions back to Judaism.
Since many Bnei Anusim (i.e. descendants of forced converts) lack an unbroken matrilineal Jewish line of descent or lack satisfactory documentary evidence to that effect (even if they can prove Jewish ancestry along one or all other of their lineages besides their direct matrilineal lineage), conversion has been a growing option for them to return to Judaism.
Julie Grey, Zara Gluch and Hannah Martin all converted religions after falling in love