Quite simple: The idea of a God does not make any sense. At all.
I agree that a contingent God does not make sense since you go into an infinite regress. Instead if we must have a first cause (which is demanded by the Big Bang), then this cause must exist by necessity. Which isn't a far fetched idea. Numbers, for example, exist by necessity. Nobody created 4. It just is.
But now we're left with a problem. We need a causal something that exists by necessity. And given that the universe exists with contingent laws and contingent constants that just so happen to be necessary for even chemistry to happen, we have an intelligent causal entity that exists by necessity. Call that what you will, but I call it God.
If you take those three attributes away you get something that's worse than magic. Somehow a causal necessary thing just so happen to get the right laws and constants? Or an intelligent necessary thing with no causal power? Or a contingent causal thing (what you think about when you say God)? No. The prime cause of everything must have all three attributes.