World War III: Should Israel try to destroy Iran's nuclear capability to stop World War Three or just to live?

The US won't make any progress with Iran, We also won't take military action. The only 2 options are will Israel A. Conduct a preemptive strike on Iran to destroy their nuclear and missile capabilities. B. Iran attacks Israel with a nuclear weapon and Israel wipes out every major arab city with nuclear weapons in retaliation, then destroys Iran and whoever else wants a piece. One of the 2 will happen. I personally think Israel will attack Iran and destroy their nuclear and missile capabilities.