"What 95 percent of all suicide attacks have in common, since 1980, is not religion, but a specific strategic motivation to respond to a military intervention, often specifically a military occupation, of territory that the terrorists view as their homeland or prize greatly."

via: http://www.thenation.com/article/heres-what-a-man-who-studied-every-suicide-attack-in-the-world-says-about-isiss-motives/