>>Yes, God is omnipotent and could have stopped it all.
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>Then he's not omniscient as you implied before. It is a logical impossibility to be both omnipotent and omniscient.
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>If he's omniscient (All Seeing), therefore he has planned everything in advance. He cannot then change his mind because that would imply a mistake, and that he was not omiscient to begin with. If he does not have the power to change his mind, therefore he's not omnipotent. You can't be both.

He's omniscient, omnipotent and immutable. That fits with your logic - does it not?