I remember one incident well. Bilal lived above a Bengali restaurant. The other guy in his flat used to sing and play guitar, diabolically out of tune. I went round one day to Bilal's and heard this guy singing and wailing. I said, "What's this?" Bilal called him a "waster" and boasted to me that a few days earlier he had brought the guy into his bedroom. He sat him down and told him he needed to pray. He told him: "If you ever play again I'm going to smash the guitar." He then put on a video of al-Zarqawi beheading one of the hostages in Iraq. "If you think I'm messing about, this is what we do. This is what our people do - we slaughter." Bilal laughed when he recounted the story. I laughed with him, although I remember thinking the word slaughter was a bit disproportionate.