I amu sure that this means that there will be some sort of attack on Israel that is more devastating than that which we have seen so far. I think that Iran is waiting until they think there will be a shift in the opinions of muslim countries indicating that in an all-out war, that muslim countries will come in on their side.
All I can say is that Israel and the US need to have nuclear weapons readied and pointing at multiple targets in Iran.
I do not doubt, for a second, that Egypt, Jordan, and even Saudi are impervious to switching allegiances. If Iran *were able* to carry out their threats, the domino effect could start if, say, Egypt decides to invade the Sinai...
I'm sure the Israelis do. Ours, and probably theirs too, can be re-targeted in moments. My understanding is that as ours set in the silos, they are targeted on empty ocean, but even an EWO came down with a target package, or just selecting a preplanned one, they would be re-targeted in virtually no time, even in the context of 30 minute flight times.