Well whoever really helped Israel aquire Nuclear Technology i.e. The British & Americans, I guess that was to help prevent anyone invading Israel because nearly all countrys in the Middle East hated Israel.
India & Pakistan have had Nukes ages, no one told them they coudnt have them etc & those 2 countrys arent exactly bumming each other like America & UK.
Russia, China, UK, France, America well we've all had them 40+ years & have kept the peace all this time so fair enough i.e. no World Wars / Nuclear Weapons used.
I think the main worry is not the fact that Iran or any other country has Nuclear weapons, its the worry that they could easily get into Terrorist hands.
Imagine this a 15KT similar to Hiroshima / Nagasaki loaded onto a Tanker or whatever & set to go off soon as it enters a UK port, that would easily wipe out the Town where I live of 88,000 population.
Now this has happend with Iran it stated they could now make 1 Nuclear Bomb per year with this amount of production facilitys, none of us do anything I would put my money on it that ISRAEL will attack Irans Facilitys they wont **** about.
Iran will probally launch hundreds of conventional missiles at Israel & then we will have an exchange, I just hope other countrys dont get involved as it's none of our business then, Israel is more than capable of holding it's own against Iran.