The Iranian leadership consists of “true believers” who take the koran literally and will do what it takes to force all non-believers (read Christians, Jews, etc) to become Muslim.
Had they developed a nuke (or let’s say a half dozen) the first one would be launched toward Israel. It would not necessarily detonate but would be blown up by Israel defences which would spread uranium all over. Others would be launched toward Saudi arabia, oman, kuwait, maybe one or two toward US allies. Even if one detonated then this poll would be reversed.
The stock markets would crash, oil prices would skyrocket and economies would suffer. Food prices would be higher than anyone imagined.
The US would of course blast Iran into glass. Then the radioactive crap would blanket the earth. The true believers would be happy because they get their 72 virgins.
Think it couldn’t happen? Go talk to one of those crazy Iranian true believers...
You left out the part where the 12th Iman emerges from his hiding place well\hole\cave. Destroys all infidels including the Muslim non-12er Shia and Sunni and conquers the world!
World peace, endless willing women to rape, gold and skittles from heaven for all eternity. What’s not to like!