Letting Iran get nuclear weapons would be an absolute disaster; letting them build shahed drones by the tens of thousands, both themselves and in partnership with Russia, was already a disaster. I personally have seen the results of that here in Ukraine. "Who started it" doesn't even matter. They're extremist Jew-hating, Russia allied, islamists who have directly and indirectly killed tens of thousands of good people this year alone. The faster Iran's islamists are wiped out the better. Hopefully that doesn't need to involve destroying all of Iran in the process. But that's ultimately up to the people of Iran to reject extremist Islam. If they fail to do that soon we should permanently crush their economy to ensure they won't be a threat in the future.