How to kill God?

Anyone have any ideas on how to kill God? I was thinking a out it and I think for a lot of people "God" is just this undefined "thing" out there that they can attribute other things to.

Like imagine a caveman kid talking to their caveman parent and asking questions like "Why is there a day and a night? Why is sky blue? Why is dog died?"

And the caveman parent just makes something up.

When people don't know the cause of something, they can create a cause out of their imagination.

God will always be lurking in the imaginations of stupid people, and we will always have stupid people on this planet.

For a while this scared me because I'm a stupid person with an imagination, so I knew the idea of "God" will stay with me till I die (since I can't think about anything when I die).

So I think the only way to kill God is if everyone dies. But even then it's a gamble because there's a whole "if a tree falls in a forest?" aspect.

Anyone else have any ideas?