Christian Belief The foundation of Christian theology includes belief that G-d exists as a Trinity, and that Jesus is the bodily incarnation of G-d and acts as a mediator between G-d and man. Hebrew Christian missionaries claim that this theology is totally compatible with Judaism. Jewish standpoint Judaism maintains that although certain beliefs may be permissible for non-Jews, they are not acceptable for Jews. The Christian theology concerning G-d is one example of a belief that is absolute