What exactly would convince an Atheist of God's existence?

If you give them personal testimony, the Atheist calls you a liar/insane.

If you use rational arguments, the Atheist falsely accuses you of a fallacy by themselves appealing to an authority in the form of a list of fallacies they think rules out anything they didn't detect in a laboratory. They don't even know what a fallacy is. It's only a fallacy if it's actually proven false.

If you only believe in "repeatable" events, then you are in fact denying half of the Standard Model of Cosmology too, because that's not repeatable.

Some Atheists now believe in the totally unprovable and untestable nonsense of String Theory with its infinite parallel universes, which are 100% undetectable, but these same people call me insane for believing in ONE Almighty God, who I know exists personally.

Does anyone see a problem with this?

What exactly would convince an Atheist of God's existence?
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