The ideology of ISIS is [ based on modern European ideas ]( http://www.theguardian.com/commentisfree/2014/sep/09/isis-jihadi-shaped-by-modern-western-philosophy ) , notwithstanding its pretension to return to the roots of Islam. Exposing this might undermine ISIS propaganda.
Ссылка: https://stallman.org/archives/2014-jul-oct.html#10_September_2014_%28The_ideology_of_ISIS%29