Like most of the Bible we are dealing with sacred fictions. The question we could ask is why should there be such conflict regarding the identity and substance of an almighty God and his son?
There is no possible way to verify dogma or doctrines determined by votes, there are no facts available to resolve contradictory mental constructs. This subject incidentally is in turn drawn from even earlier mythology, in this instance sun gods and their sons being the "exact representation of their very being".
Therefore when faced with the impossibility of knowing anything factual about an almighty God, all we can do as Ehrman does (in Cofty's youtube submission, "Evolution of Jesus in early Christianity") is to trace the development of the myths and religious doctrine giving a date and a sociological snapshot of the milieu in which the concepts took root.
Btw, did anyone note how Ehrman speaks here in the "messianic" style of Fred Franz, with the same high pitch for almost half of his talk and going higher still at the paradoxical high points? The only differences being that Ehrman uses a critical analysis of his material and speaks faster than Franz did.
