Well, it's not just about if they existed it or not, it's about if there is evidence for the central claim of their religions. Christianity was not started to be some other philosophy, like Stoicism, it was started because the Messiah as foretold in the scripture had arrived. Christianity claims certain things happened in history, and that these things are evidence of its claim as being the only way to God. So it's not a matter of dissecting every religion for some good parts and bad parts, but it's a matter of critical thinking and evidence.
@Mage
@Mage