John Mann, you said some pages ago:
He's bound by His nature. He can't lie or be evil, for instance.
Then you adhere to Anselm's ontological axiom, according to which:
"[god is something] that than which nothing greater can be thought"
Well, here's the thing: I can think of a being that isn't bound by anything. That would be "god" in my mind. Doesn't matter if I like that idea or not, or if I believe it or not, that's the greatest being I can think of. Yet, as per your belief, the god of christianity is bound by his nature and the impossibility of doing evil. Therefore, since he isn't the greatest thing that can be thought, the god of christianity cannot be god.
That is, if we go by your flawed logic.