Comparative religion Abrahamic religions consists of the three monotheistic religions, Christianity, Islam and Judaism, which claim Abraham (Hebrew "Avraham" אַבְרָהָם; Arabic "Ibrahim" إبراهيم ) as a part of their sacred history. Smaller religions such as Bahá'í Faith that fit this description are sometimes included but are often omitted. The original belief in the One God of Abraham eventually became strictly monotheistic present-day Rabbinic Judaism. Christians believe that Christianity is the fulfillment and continuation of the Jewish Old Testament. Christians believe that Jesus (Hebrew "Yeshua" יֵשׁוּעַ) is the Messiah (Christ) foretold in the Old Testament prophecy, and believe in subsequent New Testament revelations
Split of Christianity and Judaism as circumcision. According to Robert M. Price, early Christianity and Javneh-Rabbinic Judaism had their own developmental trajectories, rather than separating in a formal way. Talmudist and professor of Jewish studies Daniel Boyarin proposes a revised understanding of the interactions between nascent Christianity and Judaism in late antiquity, viewing the two "new" religions as intensely and complexly intertwined throughout this period. According to Boyarin, Judaism and Christianity "were part of one complex religious family, twins in a womb," for at least three centuries. Alan Segal also states that "one can speak of a 'twin birth' of two new Judaisms, both markedly