firstly, there are competent modern philosophers making arguments as to the necessity of god, and secular sources attesting to the historicity of jesus (see tom holland). secondly, atheism is a phenomenon which has primarily developed in the christian west. of course, under a christian justice system, the atheist will not commit more crimes so as not to be punished. criminal liability deters. pointing to stable crimes across religious stratifications in countries which are predominantly culturally christian is probably less useful than, say, comparing what different religions do to different cultures. atheism creates the ussr and ccp. third, you missed op's point, which is that morality needs a foundation at a philosophical level, otherwise it can always be undermined and sidestepped. if there is no ultimate good, there is no wrong, morality is relative, and i can do as i please and only have to worry about consequences.
Kekistani