An updated short article by Charlie Winter, ex-Quilliam Foundation, on the Lawfare blog:
Editor's Note: The Islamic State produces potent propaganda, inspiring tens of thousands of Muslims to travel to Syria to fight and encouraging other Muslims to launch attacks in their home countries. The propagandists also try to brainwash those unfortunate enough to be under the group’s thumb. Charlie Winter of Georgia State University explores the Islamic State’s internal propaganda mechanisms, offering an in-depth description of its media machine and the dangerous messages it churns out.