I concur with Mariner. Iran is likely one of those rare situations that can be solved with airpower alone. Their air force is no match for us, so we would have air dominance early on day one, killing everything that flies and taking out the ground-based air defense stuff. Then we can destroy the nuke facilities. After that it depends on goals. One option would be to destroy just the Revolutionary Guard and whatever mullahs we can get and then see how the Iranian regular military handles things from there. The other option is to crush their entire military as well as the Guard, and a third is to just keep going until their infrastructure is so ruined that they literally have to choose between nationhood and having a nuke program.
Look I’m all for the end of the Islamic Republic, but to Code Pink and the Rats this just screams Christmas Bombings in Cambodia, which would make the similarities to Vietnam even “more clear”. The treasonous Rats will make anything we do to Iran a holocaust.
If we really wanted to inflict pain, we could take out a few critical dams...