Bruce kinda started that thread about how philosophy is at odds with Abrahamic religion that I wanted. Again, its a fine line. You have to be a hardcore apologist to not see how Jesus (God or no) conflicted with Judaism, thus leading to 'he's possessed by a devil' line. How much credibility does that old chestnut have if Jesus was accused of it?
And in the Jehovah's witness doctrine if Corinthians and Paul is lying or wrong about Jesus being God, its kinda hard for Paul to hold much water on relating to Satan.
Then you have the definition of Satan and hell. A lot of Christianity and certainly Islam think in terms of dualism, requiring mounds of apologetics. And then hell, is it a place outside of Jerusalem, a place from Greek mythology, a metaphor, something new and undefined?