Jamal Harwood prays five times a day. He doesn't drink, smoke or eat pork. He's active in his local Muslim community, and he's very serious about the need for an Islamic state. But if you passed him on the street, you would have no idea. Not just because Harwood, a financial consultant in London, wears a suit instead of traditional Muslim dress. Or because he keeps his beard cropped fashionably close. But because he's white.
Born in Vancouver, Harwood used to be a model Christian, studying the Bible, attending church and taking religion classes at school. "But I had certain reservations,"...