The difference is, Trump doesn’t want an invasion, he just doesn’t want to look “weak”. The war in Iran is more likely to unfold like the Vietnam war- a colonial power bites off more than it can chew so the US steps in to help them, slowly at first, and then after a few years it and a gulf of tonkin later the US is fully committed and kids are out on the street burning their draft cards.
The good news is, it means that there will be a lag between the time the war kicks of and the time America is prepared to fight it effectively. A lot can happen in that time, and the public support for invading Iran is already WAY smaller than the support for invading Iraq, and Americans haven’t even started dying yet. This feels like the tsar picking a fight with Japan. It will radicalize a lot of people
They should have gone all the way and named the movie Justin Time