Actually what would happen is the complete opposite:
1. Since Israel has been defeated by Lebanon, and now by even Gaza people, the weakest of the weak, Israel will sign a peace treaty with Pals and solve all the problems with Syria and Lebanon (return of Golan to Syria, Shebaa farms to Lebanon).
2. New US administration will be in synch with westen europe. Russia will stay quiet, but they may invade Ukraine, or Ukraine may decide to align itself with Russia.
3. Arab regimes will either completely democratize or they will be brought down by internal forces. If Hamas gets what they want by force like what Hezollah did, then the route that regimes like Egpyt and Jordan followed will look long and fruitless. Egypt 's military may feel low as they had to beg Israel to get the Sinai as a loser while Israel is giving Hamas and Hezb what they want from the position of equals. If things do not change in Egpyt, Egypt military may revolt against their leaders to honor/redeem themselves, and bring to their people true and honest leaders.
Israel will also be happy to see this happening, as a rich and democractic arab world is in its interest in a new reality, similar to the the old reality in which a poor and undemocratic arab world was in its interests.
I rather see a world of peace, and end of conflicts on the horizon. We are at the beginning of a new area of peace and prosperity.