Well, that one is at least theoretically possible - seeing as how the US actually has the projection capacity to try somehting of the sort. In practice it'd take some extraordinary circumstances indeed - one thing the World Wars taught is Thou Shalt Not Fight With Thine Peers, and the technology gap between US and Euro armies isn't big enough that the former could except victory without hideous costs.

'Sides, thus far the "Democratic Peace" hypothesis has held. Have fun trying to convince US voters the patently democratic, human-rights-respecting, trading-partner Euros need going war with...

I certainly hope you are right. I would feel much better about the whole matter if the Iranian government would take some measures, such as impeaching this man who makes these threats against Isreal and the United States. Perhaps the world would be more convinced of their claims of wanting nuclear fuels for peaceful uses. How much power does this...so called President yeild? His popularity with his people, if the media can be believed, makes me think that he has much power.
Not all Presidents are equal. Ours, for example, is largely a decoration; does anyone even know what the Italian one is called...? I'm under the impression the Iranian president is about in the middle range as far as invested power goes - but you'll also have to keep in mind some of the peculiarities of the Iranian system, such as the ...whatwasitcalled... Council of Watchers or whatever that bunch of old men in black ropes with de facto veto rights was called. Personally I suspect they let Ahmajeddin or what his name now was to run his mouth as both a distraction and a sort of publicity stunt.

It's also entirely possible his office de facto gives him jack all say in these matters in the first place. I don't know much of the Iranian CoC, and how it works in practice.

If I'm not entirely mistaken the Iranian official ideology is one of "Islamic revolution", correct ? Right now they're about the sole example, and I'm willing to bet the mullahs aren't willing to sacrifice the sole bastion of the movement for naught. If the Prez starts running too loose odds are the rest of the adminstration reins him in rather promptly - remember, despite its peculiarities Iran is a constitutional republic. If that for some reason fails, I find it slightly difficult to believe the mullahs would let the flagbearer nation of Islam (as they see it, anyway) get obliterated just because.

'Course, it's different if they too want to pop a few nukes... but sufficient motivation for that is mildly difficult to imagine.