When it comes to terrorism and extremism, intelligence agencies in the US and Europe have been grappling with the bewildering phenomenon: that a surprisingly large number of Islamic radicals are relatively well off and well-educated Westerners.
A former member of a Muslim extremist group tells Lesley Stahl the reason for the increase in home-grown jihadists is an ideology called “the Narrative,” that says the United States is out to destroy Islam. He was once a crusader for the Narrative. Now he’s crusading for the other side.
Watch the video.