While cyberwar and sabotage can extend the time in which Israel feels safe enough to wait -- even for indefinite years:

"Netanyahu must see, in the very least, two major risks in waiting years. One is those unknowns ó the things another nation might have already reached [in weapons capability] that you donít know about. The other is that someone else may be in power [in Israel] by then who will lack the will to take action, and Netanyahu wants to get this job done because he knows he has the resolve to do it." ( http://thegreatrecession.info/blog/israel-ira... )

Therefore, he won't wait long.

--Knave Dave