What is the standard of morality by which the atheist would judge God?

Is that standard itself a product of evolution?  If so, then could it have evolved otherwise than it has?

If it could have, then if there is a God, God would be its judge rather than vice-versa.

If it could not, then perhaps it points to God, correctly understood, and the atheist's criticism is directed towards something more like a demi-god.