Where they all do...when it gets too close to the brink of total war, the west will pull Israel back.
It's a simple equation: We are the world's wealth, we are the economy. We have more to lose from total war than those still living in the 6th century. It's our economies that will be crushed by the end of flowing oil. Since we have the most to lose from war, we will make dern sure that the lid doesn't come totally off the pot.
No sane person on the planet wants a war. The unfortunate thing is that not all the players in this one are all that sane, or at least their desperation makes them seem that way. I hope the sane ones, and I'll bet many are working behind the scenes on this, outnumber and outwit the insane ones. I also hope the insane ones get knocked back 20 years so they have to start all over.