Depends on the size of the strike. Sadly, it also depends on the US position, currently led by BHO.
He wants to use all uncertainties as reasons for Israel not acting -— but of course as a Euro-socialist he really isn’t interested in Israel’s best interests and long-term security. For him (in his view) he risks absolutely nothing with a nuclear-capable Iran. He states that Iran might stop short of actual nuclear weapons creation, which sounds like an absurd liberal fantasy to people with a grounding in reality.
One thing I do agree with is that any Israeli strikes have to be successful enough to really set back the Iranian nuclear program a very long time — it really doesn’t help matters to introduce only a delay of a year or two. There is the prospect of motivating the Iranian regime pour even more resources into a renewed nuclear program with more remote and deep buried facilities, I would guess. Can they really be stopped in the longer run of more than a few years? The USA could do it but hard to imagine anything happening under Obambi....
I simply don’t know what the prospects are for airstrikes that could really disable this program for quite a few years. But if Israeli officials have enough grounds to believe that’s a likely outcome, and given that nothing else is going to stop the Mullahs from acquiring nukes, then Israel will need to go for it.