EVIL WITHIN
That the London killers were native Brits surprised a lot of people, which is testimony to our capacity to forget our own history. The 7/7 terrorists were neither the first British terrorists (take Richard Reid, the "shoe bomber," for example), nor the first terrorists born and bred in a Western democracy.
It is quite easy to compile a long list of native American, British, French, German, Spanish, and Italian terrorists — suicide and otherwise. Mohammed Bouyari, the assassin of Dutch filmmaker Theo van Gogh, was born and bred in the Netherlands.
These facts were known, but got relegated to that part of the spirit that shelters active thought from unpleasant truths. The knowledge that our societies contain people ready to kill us had not penetrated the awareness of the British people, and, with them, countless Europeans and Americans.