Naomi 24: What a strange comment! I greatly value the perspective of the Jewish scholar, Geza Vermes, to my mind one of the best and most rigorous commentators on the life, times and documentation of Jesus the Jew. I absolutely concur that he did not "found" a religion - for the most part, contemporary Judaism seemed to be sufficient for him, albeit with a few adjustments to mitigate some of the more fanatical extremes. No, he didn't lead Christians, but the evidence seems to be that those who got called Christians followed - or tried to follow - what they understood of him and his perspective not on the existence of God - that was taken for granted - but on his nature.
As for the communist states, I would argue that they followed a religion all their own, based on a bastardised "scientific" view of history and social order and hostile to more conventional religious expressions. Both gave way pretty quickly to personality cults in which Lenin/Stalin and Mao stood in as ersatz messiahs. Humans apparently have to have faith, even if it is in a bloke with political power and an unlimited capacity for deception.
Night night!