Confronted with a furtive individual who reportedly refused to obey orders, dressed suspiciously, and fled over a turnstile towards the subway train, London authorities made a fateful split-second decision in a moment of great danger. I have a feeling that no one who works in law enforcement--here or around the world--will blame the police for the actions they took, and I doubt the majority of Britons will either.
Nice deflection. This issue is not those who are second-guessing cops who are frequently in horrible positions. I wasn't there and I don't know what they knew or what they thought they knew or what their orders were. Some of that will be revealed. The issue is the cheerleaders of the "shoot first ask questions later" attitude, and the critics of those who dare suggest that shooting someone the government has labelled "terrorist suspect" absent trial is problematic.
Bush and the Right generally have become masters of this rhetorical trick. Criticize the Bush policies in Iraq? You're attacking the troops! Criticze the Bush policies in Gitmo? You're attacking the troops! Criticize the 101st Fighting Keyboarders glee about the killing of "bad" brown people in London? You're attacking London bobbies!
It's long past time for the Right to take responsible for its own actions and rhetoric, and stop trying to pawn it off on those on the front lines.