Abrahamic religions "Abrahamic traditions" has been challenged. In 2012, Alan L. Berger, Professor of Judaic Studies at Florida Atlantic University, in his Preface to "Trialogue and Terror: Judaism, Christianity, and Islam after 9/11" wrote that there are "commonalities", but "there are essential differences between the Abrahamic traditions" both "historical and theological". Although "Judaism birthed both Christianity and Islam", the "three monotheistic faiths went their separate ways". The three faiths "understand the role of Abraham" in "differing ways", and the relationships between Judaism and Christianity and between Judaism and Islam are "uneven". Also, the three traditions are "demographically unbalanced and ideologically diverse". Also
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