I know many will say that Iran would never use a nuke against countries that have more nukes than they have. But this arithmetic does not stop Iran from striking stronger countries with their usual terror attacks. And what if Iran uses a proxy to deliver a nuke to a port? How do you determine who did it?
I believe Iran would use their nukes when they have a military capable missile to deliver them against us and Israel. They want their 12th Mahdi to return.