"Many were shocked that the apparent executioner in videos made by the Islamic State, or ISIS, was an educated, middle-class metropolitan."

"In fact, academic institutions in Britain have been infiltrated for years by dangerous theocratic fantasists. I should know: I was one of them," writes Maajid Nawaz, in a NYT op-ed.

Islamist �entryism� � the term originally described tactics adopted by Leon Trotsky to take over a rival Communist organization in France in the early 1930s � continues to be a problem within British universities and schools. Twenty years ago, I played my part as an Islamist entryist at college....

I had a mind inquiring enough to question world events, as well as the passion fostered by my background to care, but I lacked the emotional maturity to process these things. That made me ripe for Islamist recruitment. Into this ferment came my recruiter, himself straight out of a London medical college.

Here's Nawaz's book: "Radical: My Journey Out of Islamist Extremism."