The irony for Israel is that they're really set up for failure on this one. They have to act to stop the threat. No one else will act for them. But they stand alone on this issue and know that retaliation will come. Many within the Muslim nations there are hoping Israel does act because it will "confirm" their "beliefs" in the eyes of the world and then give them an excuse to react knowing the US is not in their corner like previously. They are painted as the lone wolf here and if they act they fall into the trap of being the radical nation needing to be put down.