Iranians have taken to the streets in massive numbers to protest, not always peacefully, their government’s economic failures. The Islamic Republic is violently trying to repress the demonstrations. President Trump is threatening to intervene militarily to stop the repression.
Military action is a dumb idea
Threatening military action may have some value as a negotiating tactic. But actually bombing would kill some civilians, generate sympathy with the regime, and cause much of the population to rally around the flag. Iranians are disappointed with their lot, but fearful of collapsing their governing institutions. They want economic results. They do not want what happened in Libya and Syria after 2011. That has poisoned the well of militarily-induced regime change.