Israel fires the bunker busters at the Iranian nuke plants because they say they feel threatened by them

You are absolutely correct, Reg.  If Israel detects a direct threat by Iranian nukes, they will certainly do that,  just like they did with that reactor(s) a few years ago.  So what?  Seeing as whatever comes out of those nukes is likely bound for Israel, I think they would be foolish not to destroy the nukes.  If Country "X" (hypothetical situation here...bear with me, who is bordering or reasonably close to US), has nukes, and doesn't like the USA, should the US, just sit back and twiddle it's thumbs letting the fucking things continue to grow, or should the US destroy them?  

Your second scenario, Iran fires back, Israel retaliates, it's "self-defense"...maybe.  It could escalate, but although I believe fully that Israel has nuclear weapons or ready capability, I don't think they would launch a  nuclear strike.  Total annihilation is rather contrary to Jewish thought for one thing, and,   if they were thinking that way (ie the way their Arab neighbors think most of the time as regards Israel), they would have nuked all of them to cinders long ago.  But...they haven't.  Now, on the other hand, if Iran, Iraq, Egypt or Syria had a nuclear arsenal...wammo..bye, bye Israel.   Sooo...fire the bunkers at the Iranian nukes?  Bet on it.  

Oh, BTW...Israel does not really listen to what the US says, or to other nations who admonish them, never has,...that's why they still exist.  So even if the US continues to scold them from time to time, (whether it be George Bush or John Kerry or perish the thought, Ralph Nader), it won't really matter, so don't let that raise your blood pressure.   Also, I don't think a US military invasion of Israel is a likely scenario if Israel doesn't "behave"; the US troops might not win anyhow.  And when it comes to the US Air Force vs the Israeli Air Force, don't make me laugh.  Now, Uncle Sam could embargo or not give 'em any more weapons (doubt that also), but then I gotta funny feeling Israel will find other ways to survive, they always have.   They seem to  do pretty well for a 56 year old country, that started it's fight for independence with primitive pistols, rifles and home-made bombs against British soldiers, and then had to fight off hostile Arab "neighbors" shortly thereafter; that fight continuing in perpetuity. 

Gene