I’m basing my opinion off a Foreign Affairs article I read a few years ago. If I find it, I’ll link it.
Think about it. If they’re such a bloodthirsty evil regime, why haven’t they tried it?
The Ayatollahs and their pals are not stupid, they’re trying to hold on to power. There has never been a war between two nuclear powered states. It’s too risky.
Even North Korea hasn’t tried it, and we know they have a nuke.