“how long until some of these countries declare war on Iran for this”
These countries are run by monarchs. Monarchs don’t have armies in the conventional sense. Armies like the US has are a mortal danger to monarchs. They have palace guards. The officers are generally part of the royal family, and they are there for show, not actual leadership. And none of them, have expeditionary forces. If they border Iran, they could invade across the border. But if they don’t then they don’t have the logistics to fight in another country. They’re not set up for that kind of power projection. In times when the regime is threatened, they will set up tanks in intersections and mow down rioters with machine guns. That’s about the extent of what they can do.
But they could send us pallets of cash and cheap oil for our efforts
Well... Kuwait DID shoot down 3 of our F-15’s with a F-18. And in fact, the Gulf States’ air defenses have been very busy, and generally successful, in shooting down Iranian missiles and drones. “The Problem” there is that a 90% interception rate is excellent... except for the other 10%.
Those same countries can also do quite a bit with air offense, could definitely help with patrolling the waters (at some risk), and so on. I think they could hold on to limited territory (a certain island). But you are correct about their limited ground power. For that, the only real opportunity I can see would be to buy off (hire) the Paks. Normally I would include Turkey, but with Turdoman, excuse me, Erdogan running it, nope. The only hope there would be if involvement gave Turkey’s economy a big boost. Erdogan DOES need that...