Anyone like Sci-fi and fantasy stories of alternative histories? I looove them.

Ok, if Jesus never existed. My guess.

Judaism would still be a cult among many religions with many gods, they may or may not still be in diaspora. Romans would probably adopt Atheism because their pantheon is just lame, who believes in that nowadays? Rome would probably not exist today.

It would be like Celtic-British Druidism, only the wierdos are druids nowadays. Most of the urbanites would probably eventually be atheist. There would really be no religion to fill in the gap that anyone would accept. Islam would never have existed since Mohammed got his inspiration from both Judaism and Christianity. Christianity focused allot of people's attention to Judaism itself. The curious factor.

Probably lots of human sacrifice, strange witchcraft, and most of the world would still be ignorant, superstitious and living like the tribes in the Amazon.