It undermines the rationality of atheism, regardless of who holds to it. Or am I missing something? If this question is all it takes to logically undermine atheism, then the only atheists around should be illogical idiots. This "something from nothing" argument against atheism seems devastating to me, but its utter simplicity makes me think it's too good to be true. Surely atheists have a simple, one-sentence reply for this:
Something can't come from nothing, yet things exist, so a supernatural creator must exist.
I'm confused. Since you are an atheist, why can't you answer this yourself?
Regardless, your logic is sophomoric. I hope you meant:
Something can't come from nothing, yet things exist, so something must always have existed.
There's a bit of a logical leap from "something must always have existed" to "a supernatural creator must exist". You either have a some unstated premises, or you are seriously logically challenged.