Firstly, IF Iran did Nuke Israel, their motive would, assumedly, be to kick the Israelis out, and give it back to the Palestinians', right?
Okay, then just WHAT would they be 'giving back' to the Palestinians? A Radioactive Wasteland?
Secondly, The Iranians are running out of Oil - they became Net Importers in 2001 because they can no longer meet their Domestic Needs; which was why, they actually want Nuclear Power Plants, and WHY that might not be such a Bad Thing after all.
Thirdly, Israel - though they won't admit it - has both A-Bombs and H-Bombs; they have German-made 'Dolphin Class' Submarines with sea-launched, Nuclear tipped, Cruise AND Balistic Missiles that can cause heavy damage to given Iranian City than the Iranians could possibly make to Tel Aviv with their wimpy A-Bomb.
Thus, the worst case scenario is that they'll have to live in the World of MAD - Mutual Assured Destruction - Just like We, the People have had to, since 1949.
You wanna live in a Rough Hood, you're gonna have to carry a bigger piece than the other guy (and, with Second Strike Capabilities, I'd say that Israel's or USA 'Back Up' is already MUCH bigger than Iran's!).....that's just the Way It Is.
Fourthly, We need to give the Iranian People, the MILLIONS OF GOOD IRANIANS who, on 9/12, filled the streets of every major Iranian City, who marched in Protest AGAINST THE 9/11 ATTACKS ON AMERICA.
Fifthly, The Basiji Thugs are all Fascist PIGS who've Betrayed the Iranians (Rather Noble, really) Islamic Revolution, and set up a Fascististic (read "Cost-Benefit Driven") Regime that would bring a tear to Herman Goerings eyes........
Lastly, that past attack, in Baluchistan (just across the border from Iran, in Afghanistan), on peasants of the 'Shi'ite Minority'- THAT was Al Qaeda, or Sunni Allied Pashtu, blaspheming the Prophets Command to become Umma Wahid, by killing Shi'ites; just as they've been killing Shi'ites for the last 1300 years (anyone know what an "Alawite" IS, or what their History looks like? They were SLAVES, and they were much abused by the Sunni Majority).
Now, the Sunni-Pashtu Led Pakistanis - whose Ghazavid Caliphate overthrew the Persian (Iranian) Empire - have Nukes; they're KILLING Shi'ites, etc., etc., they are a Very Real Threat to the Iranian People and Nation.
What makes anyone think that the Iranians are looking for anything more than Detente in THAT THEATRE?