"The great miracle of American politics is that although it can tend toward the cutthroat and thuggish, it is almost devoid of genuine violence outside of a few scuffles and busted lips now and again. With the exception of Saturday's slaughter, I'd wager that in the last 30 years there have been more acts of physical violence in the stands at Philadelphia Eagles home games than in American politics.
Any call to cool "inflammatory" speech is a call to police all speech, and I can't think of anybody in government, politics, business, or the press that I would trust with that power. As Jonathan Rauch wrote brilliantly in Harper's in 1995, "The vocabulary of hate is potentially as rich as your dictionary, and all you do by banning language used by cretins is to let them decide what the rest of us may say." Rauch added, "Trap the racists and anti-Semites, and you lay a trap for me too. Hunt for them with eradication in your mind, and you have brought dissent itself within your sights.""
Great, well reasoned article by Jack Shafer at Slate