I'm guessing you meant JCPOA and not the Jefferson Council on Aging.
Obama, Obama, Obama. LOL You know he left office 10 years ago, right? IDK why he pushed the deal. Maybe he wanted to earn his Peace Prize?
As for nukes, I've worked with them in the service. Not an engineer, but my understanding is that the refinement of nuclear material is so complex that any use of it, even after a detonation, reveals where it was made/refined. Iran could make a Dirty Bomb, give it to the Houthis who, in turn, load it aboard a cargo plane, fly it off the East Coast of the US at 40,000' and detonate it thus spreading nuclear material for hundreds of miles along the Eastern seaboard. Analysis would reveal it came from Iran.
If that happened, I would support the complete destruction of Tehran. Anyone who thinks the Iranians aren't smart enough to know the consequences should educate themselves on the subject.
The reason Iran wants a nuke is the same reason Israel wanted one; to prevent conventional invasions. When Israel got the bomb, the Arab army attacks stopped and the switch to terrorism began. Why? Because they knew a conventional attack could easily lead to a loss of their respective capitols.