Young Muslims are easy prey, Qadir told CNN, because they believe the British government crackdown has scapegoated them because of their religious beliefs. The youth also can empathize with those who castigate the Bush administration.
There are some who believe "blowing people up is quite cool," Qadir said.
Qadir asked them why that was justified.
"The answers that I got back is: When a bomb goes off in Baghdad or in Afghanistan and innocent women and children are killed over there, who cares for them? So if a bomb goes off in America or in London, what's wrong with that?" he said.
Qadir is trying to get mosque leaders, many still practicing the tribal traditions of Pakistan, to communicate with the younger generation. But he says it is an uphill battle when radicals like Choudary dominate the debate, getting their faces -- and their message -- out in the public.
"Our scholars ... are not coming out of their holes -- their mosques and their holes -- to engage with these people. They're frightened of that," Qadir said.
The message of extremism can also thrive among youth who see no way out of ethnic ghettos.
"They're into all kinds of vices -- street crime, gun crime, drugs, car theft, credit card fraud. But then now you've got another threat," Qadir said.
"The new threat is radicalism. It's a cause. Every young man wants a cause."
