Generally, beliefs of these groups are not compatible with Rabbinic Judaism. Instead, their beliefs fall outside of the traditional views of the Torah and Jewish law. These movements may be explicitly atheistic, or they may incorporate certain elements foreign to Rabbinic Judaism, such as Christian (including Jewish Christian), Muslim, pagan, or other religious traditions. Rabbinic Jewish movements often criticize alternative groups as “not being Jewish”, as alternative groups often follow ideas that fall outside two important parameters (or the Rabbinic interpretation of the parameters) that are historically apparent in Jewish theology: the oneness of God and God’s non-corporeal nature. However, according to the Pew Research Center, 34% of American Jews whom were counted as Jews in a 2013 Pew Poll found Messianic Jews/Jewish Christians to be Jewish in at least an ethnic sense.
A number of non-Jewish movements consider themselves to be "Israelites" due to a purported connection to the Ten Lost Tribes, such as the Anglo-Israelism movement. These groups are not generally made up of Jews, and in some cases deny that the Jewish people are related to the ancient Israelites. See also Supersessionism.
^"For most American Jews, it is acceptable to blend some degree of foreign spiritual elements with Judaism. The one exception is Christianity, which is perceived to be incompatible with any form of Jewishness. Jews for Jesus and other Messianic Jewish groups are thus seen as antithetical to Judaism and are completely rejected by the majority of Jews". (Kaplan, Dana Evan. The Cambridge Companion to American Judaism, Cambridge University Press, Aug 15, 2005, p. 9).
^*Kaplan, Dana Evan (August 2005). "Introduction". In Dana Evan Kaplan (ed.). The Cambridge companion to American Judaism. Cambridge Companions to Religion. New York, NY: Cambridge University Press. p. 9. ISBN0-521-82204-1. LCCN2004024336. For most American Jews, it is acceptable to blend some degree of foreign spiritual elements with Judaism. The one exception is Christianity, which is perceived to be incompatible with any form of Jewishness....Messianic Jewish groups are thus seen as antithetical to Judaism and are completely rejected by the majority of Jews.
Ariel, Yaakov (2005) . "Protestant Attitudes to Jews and Judaism During the Last Fifty Years". In Robert S. Wistrich (ed.). Terms of survival: the Jewish world since 1945 (Digital Printing ed.). New York, NY: Routledge. p. 343. ISBN0-415-10056-9. LCCN94022069. Evangelical Christians are engaged in aggressive and extensive missionary activity among Jews. Among other results, this has given rise to groups of 'Messianic Jews', of which 'Jews for Jesus' is the most outstanding example. These are actually Jews who have adopted the evangelical Protestant faith and its precepts.
Simmons, Shraga. "Messianic Jews, Buddhist Jews". Ask Rabbi Simmons. About.com. Retrieved 2007-02-14. Yet there are limits to pluralism, beyond which a group is schismatic to the point where it is no longer considered Jewish. For example, everyone considers Messianic Judaism and belief in Buddha as outside of the Jewish sphere.
Schoen, Robert (April 2004). "Jews, Jesus, and Christianity". What I Wish My Christian Friends Knew about Judaism. Chicago, IL: Loyola Press. p. 11. ISBN0-8294-1777-X. LCCN2003024404. The Jewish people believe that when the Messiah comes there will be an end to world suffering....Jews do not believe, therefore, that the Messiah has come, and they do not recognize Jesus as their savior or as the Son of God.
"Messianic Judaism: A Christian Missionary Movement". Messiah Truth Project. Archived from the original on 12 February 2007. Retrieved 2007-02-14. Messianic Judaism is a Christian movement that began in the 1970s combining a mixture of Jewish ritual and Christianity. There are a vast and growing numbers of these groups, and they differ in how much Jewish ritual is mixed with conventional Christian belief. One end of the spectrum is represented by Jews For Jesus, who simply target Jews for conversion to Christianity using imitations of Jewish ritual solely as a ruse for attracting the potential Jewish converts. On the other end are those who don't stress the divinity of Jesus, but present him as the "Messiah." They incorporate distorted Jewish ritual on an ongoing basis.
Ariel, David S. (1995). "The Messiah". What do Jews believe?: The Spiritual Foundations of Judaism. New York, NY: Schocken Books. p. 212. ISBN0-8052-4119-1. LCCN94003550. The Jews of the first centuries of the Common Era believed the Messiah had not yet come, while the followers of Jesus—strongly influenced by contemporary Jewish messianism—asserted that he was the Messiah. The belief that the Messiah has arrived and that he is Jesus is the teaching that most acutely divides Judaism from Christianity.
Nuesner, Jacob (February 2000) . "Come, Let us Reason Together". A Rabbi Talks With Jesus. Donald H. Akerson (forward) (Revised ed.). Canada: McGill-Queen's University Press. pp. 3–4. ISBN0-7735-2046-5. LCCN2001339789. I write this book to shed some light why, while Christians believe in Jesus Christ and the good news of his rule in the kingdom of Heaven, Jews believe in the Torah of Moses and form on earth and in their own flesh God’s kingdom of priests and the holy people. And that belief requires faithful Jews to enter a dissent at the teachings of Jesus, on the grounds that those teachings at important points contradict the Torah. Where Jesus diverges from the revelation by God to Moses at Mount Sinai, he is wrong, and Moses is right.
^Schiffman, Lawrence H. (1993). "Meeting the Challenge: Hebrew Christians and the Jewish Community"(PDF). Jewish Community Relations Council of New York. Archived from the original(PDF) on 2006-11-07. Retrieved 2007-02-14. Though Hebrew Christianity claims to be a form of Judaism, it is not. It is nothing more than a disguised effort to missionize Jews and convert them to Christianity. It deceptively uses the sacred symbols of Jewish observance...as a cover to convert Jews to Christianity, a belief system antithetical to Judaism....Hebrew Christianity is not a form of Judaism and its members, even if they are of Jewish birth, cannot be considered members of the Jewish community. Hebrew Christians are in radical conflict with the communal interests and the destiny of the Jewish people. They have crossed an unbreachable chasm by accepting another religion. Despite this separation, they continue to attempt to convert their former coreligionists.
^Balmer, Randall Herbert (November 2004). "Messianic Judaism". Encyclopedia of evangelicalism (Rev. and expanded ed.). Waco, TX: Baylor University Press. pp. 448–449. ISBN1-932792-04-X. LCCN2004010023. Retrieved 2007-02-14. Messianic Jewish organizations, such as Jews for Jesus, often refer to their faith as fulfilled Judaism, in that they believe Jesus fulfilled the Messianic prophecies. Although Messianic Judaism claims to be Jewish, and many adherents observe Jewish holidays, most Jews regard Messianic Judaism as deceptive at best, fraudulent at worst. They charge that Messianic Judaism is actually Christianity presenting itself as Judaism. Jewish groups are particularly distressed at the aggressive evangelistic attempts on the part of Messianic Jews.
^Waxman, Jonathan (2006). "Messianic Jews Are Not Jews". United Synagogue of Conservative Judaism. Retrieved 2007-02-14. Hebrew Christian, Jewish Christian, Jew for Jesus, Messianic Jew, Fulfilled Jew. The name may have changed over the course of time, but all of the names reflect the same phenomenon: one who asserts that s/he is straddling the theological fence between Judaism and Christianity, but in truth is firmly on the Christian side....we must affirm as did the Israeli Supreme Court in the well-known Brother Daniel case that to adopt Christianity is to have crossed the line out of the Jewish community.
^"Missionary Impossible". Hebrew Union College. August 9, 1999. Retrieved 2007-02-14. Missionary Impossible, an imaginative video and curriculum guide for teachers, educators, and rabbis to teach Jewish youth how to recognize and respond to "Jews-for-Jesus," "Messianic Jews," and other Christian proselytizers, has been produced by six rabbinic students at Hebrew Union College-Jewish Institute of Religion's Cincinnati School. The students created the video as a tool for teaching why Jewish college and high school youth and Jews in intermarried couples are primary targets of Christian missionaries.
^*Harries, Richard (August 2003). "Should Christians Try to Convert Jews?". After the evil: Christianity and Judaism in the shadow of the Holocaust. New York, NY: Oxford University Press. p. 119. ISBN0-19-926313-2. LCCN2003273342. Thirdly, there is Jews for Jesus or, more generally, Messianic Judaism. This is a movement of people often of Jewish background who have come to believe Jesus is the expected Jewish messiah....They often have congregations independent of other churches and specifically target Jews for conversion to their form of Christianity.
Lotker, Michael (May 2004). "It’s More About What is the Messiah than Who is the Messiah". A Christian’s guide to Judaism. New York, NY: Paulist Press. p. 35. ISBN0-8091-4232-5. LCCN2003024813. It should now be clear to you why Jews have such a problem with ‘Jews for Jesus’ or other presentations of Messianic Judaism. I have no difficulty with Christianity. I even accept those Christians who would want me to convert to Christianity so long as they don't use coercion or duplicity and are willing to listen in good faith to my reasons for being Jewish. I do have a major problem with those Christians who would try to mislead me and other Jews into believing that one can be both Jewish and Christian.
^Berman, Daphna (June 10, 2006). "Aliyah with a cat, a dog and Jesus". Haaretz. Archived from the original on 28 March 2007. Retrieved 2007-02-20. In rejecting their petition, Supreme Court Justice Menachem Elon cited their belief in Jesus. ‘In the last two thousand years of history...the Jewish people have decided that messianic Jews do not belong to the Jewish nation...and have no right to force themselves on it,’ he wrote, concluding that ‘those who believe in Jesus, are, in fact Christians.’ The state's position is backed by all streams of normative Judaism, none of which recognizes messianic Jews as Jews.