Believe what you will, I could care less. But it's apparent the nation and a growing number of prominent Republicans, either on record or behind the scenes, are tired of another endless war on a noun. There is only a very small percentage that would support military action on Iran if they sat down and thought about it. Just because you sit in an echo chamber of 'bomb 'em back to Mecca', etc. doesn't change the fact that the Iranian situation will be resolved diplomatically
That presupposes that Iran has any intention to allow anything to be resolved. I see no evidence of that liklihood. Iran is ideologically driven to seek total dominance of the crescent, and that cannot be resolved diplomatically.