2) wrecking Iran, without local collaborators (whom, i repeat, were few and were crushed), would require a far larger campaig of terrorist bombing from outside than the US has ever run, even compared no the Korean War or Vietnam. The US military does not have the ammo necessary to even degrade Iran's military. It can hit civilian targers and cause great hardship and humanitarian disasters, but cannot sustain that for long. Regarding missiles: the US standard attack missile is the obsolete tomahawk, which is being produced in tiny numbers, and most of the new ones are actually refurbished. Syria, with old air defense systems, shot down a lot of those sent their way. Iran has more aid defense, and vasly more targets, than the US has missiles. Regarding artillery: the US cannot even get close to Iran to use it, and anyway failed to produce enough shells for its anti-russian crusade in Ukraine and can't even produce enough explosives to expand its shell production, so no role for artillery. Or indeed any large scale ground war: the US army cannot invade Iran not just because the US is casualty averse but because it lacks the ammunition to figh a war with a sesioulsy armed opponent. Regarding aviation: the US does have a large stock of bombs and planes, but where can they lauch from? Aircraft carriers can easily be spotted by the iraning missile forces and targeted. The range of the ballistic missiles exceeds the range of the planes the carriers carry and some of those missiles are manouverable: is the US navy itching to lose its first carried since WW II? Closer to shore and barely putting the iranian coast (not the interior) in range of the planes, ships are sure to be sunk by hypersonic anti-ship missiles. There are land bases but all nearby countries have denied their use. Saudi Arabia doesn't want its oil fields on fire. The UAE doesn't want its skyscrappers with missile ornaments sticking out. Longer range air attacks? Possble with refueling but where are those planes going to work from? Some are being moved to Jordan - well within range of both missiles and drones from Iran. Conclusion: Iran can defent itself and the US cannot bomb it apart. Even if it had the ammunition (which is doubtful) to seriousoy make an impact, it can't get close enough to use it in quantity: counter-strikes would destroy its lauch platforms. I doubt it can even send in enough missiles to deplete the iranian aid fefense and allow planes to safely enter its airspace.