I also think that nuclear powers mean regional stability. Ukraine gave up its nukes in the 90s and we saw what happened there.
> We better remove and halt nuclear powers for the rest of my life.
Neither of those things is a guaranteed outcome of this. Depending on who you ask, it's not even a likely outcome.
The IRGC remains the most powerful group in Iran. Probably a military junta is a more likely outcome, plus or minus a civil war to establish it.
I doubt it. US intervention seems to have a habit of creating weakened nations for its rivals to benefit from. In Iraq's case: Iran and in Iran's case maybe the Taliban in Afghanistan.