Its the 5 minutes to midnight issue.What is the 2355 scenario?
ie do they run the risk of getting caught up in the defcon 2 to defcon 1 scenario
whether the US wants to or not, it will be critical in influencing what degree of activity the israelis are confident of undertaking.
of course the israelis may act unilaterally, but they will still want US support prior to and after the event, again, depending on what they see is the need to do to protect the state.