The Mr. Rogers junk is just to deter gung-ho idiots from killing their fellow citizens. You see, one of the early murders was a gung-ho idiot who thought his patriotic duty was to kill an Indian Sikh because the poor guy LOOKED like an A-rab.
If it wasn't for the idiots who run out and play Mr. Vigilante by killing anyone who doesn't look like a WWF fan, we wouldn't have to hear all this PC bull.
There will always be those too dumb to distinguish between a Sikh and A Mo'Ham, just as there will always be those too dumb to distinguish between Islam and a religion of peace.