"Iran could do whatever they want" was SARCASTIC (If you actually listened to what he said) He said Iran is losing and withdrawing because of sanctions and could "do whatever they want" (i.e. Jump in a lake)
Let Isis, Turkey, Russia, Iran, Assad, China, or any other do something stupid. It will be the worst decision humanity has made since adopting the influence toward selfishness or since we ate the fruit of the tree of the knowledge of evil. Sure some of us will die, we are everyday, but stupid will kill many more.