Ummm, what?

If quantum gravity theory is correct time is but an illusion. It follows that the concept of creation is meaningless. Our feeble brains don’t work on the level of ultimate reality. “God” is just a word, an icon for what we don’t know and it’s futile to try to talk about something when you have no idea what you are talking about.

god isn't nothing. people may disagree about what god is, but nobody who believes in a god or gods says he, she, it or they are nothing. people attribute characteristics to their god(s). no one describes god as emptiness. so these imaginary entities cannot have something coming from them on the basis that something comes from nothing because they may be imaginary but they're not nothing (nothing is not a synonym for nonexistent), and they cannot have something coming from them BECAUSE they're imaginary. in addition, one can answer that question without even letting the second half be spoken: "the cosmos can be created spontaneously, out of nothing right?" and you interrupt with "wrong!" then you point out that the person asking probably has once asked "if we evolved from monkeys, how come there are still monkeys?" and had to be corrected on the first half of that question too.

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By equating nothing with god you make it seem like nothing is something, which by definition it is not. God has some properties, nothing doesn't have properties.

Nothing can come from things that are imaginary.

No, false premise. I don't think it's ever been established that everything came spontaneously out of nothing. The furthest back we can trace everything is the singularity before the big bang, at which point all the matter in the known universe already existed, condensed into a small point which then rapidly expanded.

We still don't know anything about how it got to that point, and that still doesnt rationally imply that a god was necessary. If your definition of god is nothingness or the god of the gaps, to fill in wherever we don't know the scientific answer, then to paraphrase Neil DeGrasse Tyson, god is a receding pocket of ignorance that will continue to get smaller until it can't be found. You're welcomed to substitute the concept of nothingness for the concept of god, same difference, but none of that makes him/it/the void responsible for what we've become.