IMHO the Israelis will strive to give the diplomatic process every chance to work, but not so long as to allow the Iranians the opportunity to stall until they have a working device that is mission capable of striking their territory. They may be coordinating with NATO all possible strike scenarios and lending MOSSAD intel as well. This is possible the most clear and present danger to the very survival of Israel since the 1960's. I also don't think that if the war option becomes the only viable solution, that we will allow Israel to act. I think the US and NATO will shoulder the burden, hopefully using some of Israel's tactical neutrons. Israel has nonaggression treaties with most of the other arab states, but I'm not sure how well those will hold in the face of aggression against Iran even if couched in the terms of pre-emptive self defense. The rest of the arab states know the dangers posed by a nuclear Iran and will, I think (hope) voice their outrage to our attack with a wink and a nod.
You think we can tell Israel what to do or not to do. Maybe in somethings but attacking Iran won't be one of them if events get too critical or dangerous for Israel. I predict all the diplomatic efforts will fail so it's U.S. or Israel, choose your poison, Iran.
Agreed.