Unless you were further proving your point about how you can't group people into the same category, you've just made that error yourself.
Also, when it comes to terrorism, criminals are not among their ranks. There ARE some categories to these things.
How active is the KKK nowadays? same level as they always have? nah...
The new terrorism that the USA and England are facing is that of the radical islamists. These people are muslim. Not all terrorists are muslim, but lately you surely conceede they are the majority.
Our american terrorist with al queda was a muslim. Just he wasn't persian or arabic.
It is wrong to discriminate against all muslims (DUH real DUH!). But like has been said: muslim governments don't try hard to dissassociate themselves with them, because the act of martyr and the killing of infidels is an islamic doctrine, taught in the Qu'ran. Imams have little moral dilemma with calling for a fatwa/jihad.