I have to say that your POV is really defensible and in line with recent history. Especially in that sort of intangible Orwell sense- the war that has always been the war.
I remember worrying during the Bush years- lots of people worried actually- that the GWOT was going to replace the norm of congressional checks on the military. And that continued through Obama's presidency, even when he tried to remind Congress that it was their job. They just wanted the President to make the decision anyway.
But the people, to my knowledge, have never supported that. We can't exactly protest in the streets over dropping a bomb on Libya here, or a drone strike in Yemen there, or even selling cluster bombs to Israel to use on Lebanon. Those are small actions that frankly don't register to us.
But is Iran part of that new normal? It's a big country with a big military. It requires enormous pre-positioning of assets, and that would play out in the public in a way similar to the Iraq buildup, but at least 4x as large. Unless I'm too out of the loop, it's not possible to do that by sniping at them with drones. They would take Iraq immediately in response, so then we have to fight a ground war or have an army in place as a deterrent.
The complications arising from occupation would be exponentially scaled up from Iraq. I think people sort of get that. I think those memes would spread, that it's a giant clusterfuck and a lost cause before it begins. Combined with the hatred this country has for Trump, I see the public blowing up.