How does destroying their nuclear reactors not shut down their nuclear program? Do you think a nuke is constructed in a day?Well thats really a broad statement I don't think that anyone can really decide that which country should have nuke capability and who should not . Israel is one country which surrounded by enemies more likely will become the first one to use them and wait do tell me who were the ones to decided for India Pak Israel China that should they have nuke capability or not, If you ask me buddy I think no one should have such WMDs in their arsenal leave alone Iran.
BTW It hardly matters how many strikes Israel will do if Iran has a capability to make Nukes they will make it no one can stop them from doing that.
It takes months even after the technology and know-how is available to them.
Israel ended Syria's and Iraq's nuclear ambitions, it will end Iran's as well unless something else happens that overthrows this government. For example, the Arab spring.
Iran is much stronger than Syria and Iraq but no wise man could doubt Israel's will to dominate all enemies that wish her destruction.