I have no doubt that Israel already has this option on the table and it is probably already in it's tactical plans but, this needs to be made clear and open to world and the muselim nations surrounding Israel that, Israel (assuming Israel has Nuclear weapons and everyone assumes they do) will have a nuclear response to every (no exceptions) Arab/Muslim country within range if Iran fires any missile towards Israel. Assuming any Missile fired aginst Israel would be a nuclear weapon and thus might literally destroy Israel. I am sure ever Arab/Muslim Nation in the middle east would make sure Iran had no nuclear weapons.
Magnitude 4.2 quake strikes near Grand Coulee Dam in Washington (Reuters)
from the article: Cries of 'hold me back' may lead Israel to strike Iran