Why doesn't God simply destroy us for our evil?
Same reason the Easter Bunny doesn't give us discounts for the dentist?
If it wasn't for God, there wouldn't be any limbs at all, or even life.
The first few billion years of life did not have the intelligence to understand a god, yet they thrived and evolved... try again.
God is so extremely great that He can't allow defamation of his character, defamation of His Name, defamation of Himself.
Then why doesn't he stop the growing atheist movement that is sweeping the planet? No one believes in fairy tales anymore. The world isn't flat.