Great post. I have made some similar points in my previous posts to explain why I don't believe in organised religion at all. The human factor is a big problem for me.

I have a theory, though it is perhaps a little wild, on how Lucifer could actually be the manifestation of God's ego, and how the battle between good and evil is a battle between God attempting to overcome his own omnipotent sense of pride. He has more reason to have an ego than anyone, and if he did you would imagine that it be immeasurable in proportion to that of ours.

This has some parallels to the gnostic beliefs and the concept of the Demiurge ( think that is what it is called).