I'll add an assessment on the possibility of "Regime change" by using long range bombardment alone. It could happen within the existing Iranian power structure, it certainly would not be occur in the form of popular uprising as some would imagine, at least not long after the dust have settled.
What Israel and now, the United States is committing is undisputed terror bombing of Iranian urban centers, no matter how you spin this, this an attack on the Iranian people and Iran as a whole. What ever anti-government feeling among the public would be fractured by this and put on hold for the time being, there would be extremists like those who chose to fight for Iraq when Iraq invaded, but they'll be a reviled minority. Even on broadly anti-government websites this consensus is beginning to form.
Opinion of Israel and United States would be severely soured by this event, even overtaking the dislike for the unpopular incumbent government for a few years. Due to this, any new leadership would likely harbor deep resentment towards Israel + United States despite outwardly favoring appeasement just to get the bombing to stop.
What is curious about this situation and almost everything Israel involves itself it, is that despite top western political leaders marching in lockstep to offer unconditional support for Israel. Pretty much everyone outside the Evangelical, Zionists of the US, and frankly every single person outside of the west recognize it as an act of unprovoked Israeli aggression. This frankly embarrassing dissonance between the actions of Western leaders and their people + the world at large, will only further discredit the "liberal, ruled based world order" they claim to lead.
This mental subservience that infects the western political leadership really should be better studied, that they are willingly to support a liability the size of Israel at the cost of their own credibility.
