AP Photo

We came here to find the new radical Islam which has become so popular since the Arab Spring. This is the house we are looking for. Going up a dark and slippery staircase, which smells of urine, sawdust and ammonia, we arrive at the third floor. We enter a darkened room, lit by a single dim light bulb hanging from the ceiling. A curtain is barely hiding the dirty toilet. A big couch, which also serves as a bed, occupies almost all the room. A 22-year-old man, Yusef, is sitting cross-legged on the couch. We have come to meet him before he leaves for Jihad in Syria. He is a Salafi Islamist, part of a movement that is fast becoming a major player in the region. This is not the pragmatic secularized Islam, nor the social democracy of the Muslim Brotherhood or of the moderate Ennahda...