Let's unpack this.
1) "There could be a creator." Well, none of us knows *exactly* what happened at The Beginning of Everything--because none of us was there!--so who knows, maybe a "deity" was involved.
And? So? What you, and many other believers, seem to think is not just a) that there *was* a being that got everything started, but b) that there *is* one--oh, and the same one!--NOW: occasionally breaking the laws of physics (so as to work miracles), meting out rewards and punishments, and requiring love, worship, and obedience. Well, b does not automatically follow from a. They are separate propositions and need to be proved separately.
2) "Something can't be created from nothing." This is simply false. There are subatomic particles that exist, then don't, then do, then don't, many times per second, and this is demonstrated in labs every day. They come out of nothing.
Beyond that, cosmologists have shown that "nothing" is an unstable state and that some kind of "something" was essentially inevitable.
3) "Before there was nothing." Time is a dimension of our universe, just as height and width and depth are, and it is meaningless--literally without meaning--to speak of, or suggest, a time "before" the universe, just as it would be to speak of something "outside" the universe.
4) Most people of faith are *not* idiots. While I have seen a few surveys that suggest the average IQ of nonbelievers is *slightly* higher than that of believers, I consider that to be meaningless because the intelligence of people within each group varies so widely.
The simple fact is that people don't get to *choose* their beliefs. If a proposition meets your standards for believability--and those seem to be mostly or wholly unconscious--you won't *choose* to believe that proposition; it will *compel* your belief. Similarly, to the extent that the proposition doesn't satisfy those standards, your believing it will be impossible (though of course you might talk or act as though you believe it). [Can a person's beliefs change? Sure. S/he might be presented with a new proposition, or his/her standards for believability could change. But no person can wake up in the morning and say, "Hey, ya know what, today Imma start believing X" or "stop believing Y." Human brains don't work that way.]
So I don't attempt to change people's beliefs. So long as they don't resort to force, or the threat of force, to impose their beliefs on others, I'm fine with it. Live and let live.