If you take a step back and look at all the major religions as a whole, theyre all pretty close to the same thing, just cultrual variances between them.
So, IMHO, they probably all originated back from the same place, and as we know, people change things and put there own twist on it.
I dont think ANY of the religious books today are 100% truth, as man has had his hands in all of them.
I would believe that as long as you had faith and tried to live a good life, regardless of which variant you choose, he's probably not going to condemn you to hell.