Saudi Arabia already is a desolate tar pit that only jackals inhabit. But they probably would blow up Mecca, too, which would be an improvement.
The Saudis may want to ensure that Mecca is not one of Israel’s targets.
The Obama/Hagel regime may have to choose between Muslim Brotherhood / Ayatollahs / Al Qaida on one side and Netanyahu / Royal Saudis / Defenders of Christianity in Egypt on the other. It’s sad that we have to wonder what side Obama would come down on.