maybe Saudi would never attack Iran, but Iran for sure would if some interest will be toucher in Qatar, because Saudi is the only real "enemy" in the area, all the rest is already collapsed or not interested or with too many problems like Turkey. I do not know if the whole war on terror is a joke, I can just notice that after the entry of Russia in the war, many things has changed drastically and slowly Mosul today and Raqqa in the future will be free from ISIS, but probably never free from what is the wahhabi indoctrination.