Since the bombings, the media and Muslims have been at pains to explain that most of the country's 2 million Muslims are peaceful. "The Muslim community in Britain has a long history and is enormously diverse," says Anas al-Tikriti, a member of the Muslim Association of Britain.
But the attacks are turning attention to the increasing numbers of young British Muslims (hundreds of thousands? -EoZ) who are rejecting their parents' traditional culture in favor of a radical and expansionist Islam. This strikingly Western version of Islam combines an independence of thought with a contempt for established traditional scholarship and a theme of teenage rebellion.
"Getting involved in radical Islam is an emotional thing rather than a rational decision," says Abdul-Rahman al-Helbawi, a Muslim prayer leader. "And it's not a matter of intelligence or education - a lot of these radicals in Britain are very well-educated."
In Dalston market in north-east London on Thursday, "Abdullah," a Muslim watch-mender and evangelist, was in a pugnacious mood.
"We don't need to fight. We are taking over!" he said. "We are here to bring civilization to the West. England does not belong to the English people, it belongs to God."
Hours after the bombings, Helbawi logged onto an Internet chat room run by British Muslim extremists. "They were all congratulating each other on the attacks," he said. "It was crazy. They were talking about how they had won a great victory over the infidels, as if they had just come back from a battle."
Although so far, there is no evidence that British Muslims were involved in the bombs, there is little doubt that many British Muslims feel that Britain "deserved" the attacks for supporting the US invasions of Iraq and Afghanistan.