I didn't know any but if i had an even an inkling that any of them were joining or about to join an extreme party i would have shopped them to the police in a heart beat. The attitude was more of a general "nothing to do with me jack, the pigs are going to my life harder now, boo!" and "great, more checks at the airport"
No consideration for the victims of 7/7
So you were part of the muslim community and didn't know any terrorists ?
Weird that's what they all say, there is a culture of "don't grass" and it sounds like you are part of it.