When you find yourself allying with Israel, slap yourself. Hard.
Then, once you recover, do it again.
The modern State of Israel is the enemy of all things holy, up to and including God Himself.
No good can ever come of allying with the devil -- or with Israel. But I repeat myself.
ISIS was set up by the United States to effect chaos in the Middle East, as well as to be the next boogeyman since "Al-Qaeda" just doesn't scare anyone anymore. Notice that ISIS isn't interested *at all* with helping the Palestinians even as they are slaughtered in Gaza. If they were really against Israel/USA, they would certainly help.
No, the USA and Israel are playing these groups (Hamas, ISIS, Hezbollah) for fools. They are controlled opposition, basically.