Israel should pre-emptively strike. If they don't? They are going to do something very drastic in terms of attacking Iran, and Iran's action will justify Israel's response. Maybe if Iran and its proxies all fire off thousands of missiles at once, Israel will just drop a nuke on Tehran and dare the world to retaliate against Israel. Maybe it is several tactical nuclear weapons, take out Iran's ability to have nukes and produce oil with it and put them out of business for decades. Israel is hoping Iran strikes them, they are ready for escalation, otherwise you attack first. Why allow them to attack if you if know it is coming? The hammer is coming from Israel, what that looks like I have no idea, Israel is a cornered dog right now and out of options to end this peacefully.