Stork : ISIS offensive in northern Mosul a catastrophe for Stork and Kurdish . Yazidis driven to mountains are now escaping , but the threat remains , Stork says . Stork : Some fleeing Yazidis suffered , died in rugged mountains . the Islamic State considers members of religious minority to be `` devil worshippers , '' he says .
Joe Stork : ISIS offensive in northern Iraq a catastrophe for Yazidis and Christians . Yazidis driven to mountains are now escaping , but the threat remains , Stork says . Stork : Some fleeing Yazidis suffered , died in rugged mountains . ISIS considers members of religious minority to be `` devil worshippers , '' he says .