Judaism
There are some movements that combine elements of Judaism with those of other religions. The most well-known of these is Messianic Judaism, a religious movement, which arose in the 1960s, that incorporates elements of Judaism with the tenets of Christianity. The movement generally states that Jesus is the Jewish Messiah, that he is one of the Three Divine Persons, and that salvation is only achieved through acceptance of Jesus as one's savior. Some members of the movement argue that Messianic Judaism is a sect of Judaism. Jewish organizations of every denomination reject this, stating that Messianic Judaism is a Christian sect, because it teaches creeds which are identical to those of Pauline Christianity.
List of Dune religions
These Jewish communities are led by rabbis, at least some of whom have working relationships with the Bene Gesserit. "Heretics of Dune" suggests that Jewish thought may have influenced the development of Bene Gesserit philosophy. The Jewish community described in the novels defines itself as part of "Secret Israel", which, in conjunction with the sparse historical information given in the novel, suggests that the Jewish people had decided to conceal themselves to follow their religion and avoid the recurrent atrocities of their past. Long ago, the Bene Gesserit and the hidden Jewish communities came to an understanding of sorts: the Bene Gesserit would provide aid to hidden Jews if they were ever threatened, and help hide the fact that the Jewish religion survives in secret; in return, if ever a Bene Gesserit acolyte is lost and threatened on an isolated planet, the local Jewish community give her aid and shelter. A simple arrangement, but one which endured between both groups for millennia. Moreover, the Torah and Talmudic Zabur are listed in Appendix II of "Dune" as having contributed to the Orange Catholic Bible; the appendix also notes that these books were preserved on Salusa Secundus.