I think trump is too self oriented to risk retaliation that could fuck him up. He is a lot of bad things. A martyr he is not.
Simple solution. Stop the sanctions on Iran, and let them run their country as they see fit.
Yankee go home.
Just think what it would be like if the bees and the rest of the animal kingdom embarked on offense instead of just protecting their own. We would be stung, suffer stampedes, be mauled, and likely eaten. All in short order. Thankfully they are all smarter and in better control than humans. G.I. come home, defend the homeland, and quit screwing with others and their resources.