I know Christians believe that Jesus is God and that's kind of a no-no in Judaism. The thing is, Jesus himself did not say he is God. Well, there are esoteric things. For example, he said that, "I ...
Is there any reason that someone who has committed horrible sins in the past (for example, mass murder) could not become a Jew? Assume, of course, that the sinner/criminal is willing to do teshuvah ...