Could you tell me where you heard/read that---because Pakis are the only ones I've heard mentioned?
I got it from a link on a thread about the catching of some of the terrorists. One of them was born in England to an Iranian born man and his English wife. His last name is Savant; his first name used to be Oliver, but he took a bunch of Arabic first names.
I'll see if I can find the thread and ping you to it.