There are some huge logical gaps in arguments for the existence of God.
My prior post about God perhaps being dumb as a rock was intended to be tongue-in-cheek ... but illustrates one of the fundamental flaws in the Ontological, Cosmological and Teleological arguments. That is, if we can't explain it, God did it.
God - as conceived in various arguments, is outside time and space and requires no cause. Special pleading at its finest. This almost always invokes the response that "if God requires no cause, why does our universe?".
Secondly, why does a "first cause" or "designer" have to be omniscient, omnipotent, omnibenevolent or omni-anything-else? If the creator of this explanatory scheme (a human, by the way) was trying to establish that this God was to be feared and obeyed, then the omni-gomnia is to be expected. How else will you revere me as a link between you peons and the omnipotent creator of all things? Otherwise, it does not explain a thing.