The powers that funded ISIS would be the next logical Leaders to topple if they are not stopped. Syria learned the hard way, Syria gave weapons to fight against the West's (CIA Sponsored Muslims) screwed up Anti-Syria's Government troops. ISIS in return started to march towards Allepo killing men, women and children that refused to convert to their animalistic cult. Syria has lost several thousand troops as ISIS try's to kill off their benefactors, Syria's leader learned the hard way, ISIS has no loyalty to anyone.
Iran warned the United States and European Countries that the US was funding terrorists, now IRAN has joined the fight against ISIS. Earlir this year there were a estimated 100,000+ Iranian Republican Guard Troops providing help against ISIS inside the Kurdish areas of Iraq.
Turkey, Iran, Iraq, Russia, UK, Syria are now wanting to destroy ISiS, why? Do you think they will unite the world to elimante a threat if not destroyed could turn the Middle East back backwards of five hundred years?