Your first sentence is missing the point. He couldn't justify a war with Iran before 2021, because they weren't enriching uranium.
I'm still confused on why you think they were stockpiling 60% HEU if not as a deterrent. Could you clear that up?
Other than that I don't think we're in disagreement really. Of course Israel wants regime change in Iran and has for a long time. They've been financing, arming, sheltering and encouraging all of the terrorist groups that attack Israel for decades, as well as attacking Israel themselves.
I don't really have any predictions. Killing Khamenei was great, but regime change would be a lot better. Arming the Kurds would help, which I'm sure we're already doing. Hopefully that doesn't have any disastrous results but honestly, the Islamic Republican government is not Mossadegh. I don't see any reason to imagine that any replacement, even a terrible one, could be worse.
I dont disagree that the 60% was a deterrent, it was a deterrant. what im saying is you dont invade over deterrent level uranium. you sanction, pressure, negotiate, etc. and if it doesnt work they're left a starving nation with a deterrant. this is the long game but it was working, with the help of CIA stoking the protests and letting internal pressure build. but unlike ukraine we didnt fund and let an internal protest topple the govt, we just used their existence as a pretense for war.
the thing missing from your viewpoint is that regime change doesnt work. its not a question of if the replacement is better or worse, it a question of if it is viable. and it hasnt proved to be. not in iraq, not in afghanistan, not in syria, not in lebanon, not anywhere. we've never once done a successful regime change. we'll blow up the country, kill many US soldiers, spend trillions rebuilding, prop up a local govt, and it will be toppled as soon as we try and pull out. or we spend endlessly to stay, which is almost as bad. but it wont last, we'll get tired of it just like in iraq, and some potus will get elected on the promise of pulling out. they will, the local govt will be toppled, and extremists will fill the vacuum.