Who's to Blame for Terrorism?

From Cliff May, at National Review:
Who deserves the blame for the terrorist attacks in Norway? My answer would be the perpetrator and no one else — unless it turns out there really is a modern Knights Templar or some other organized movement that sent him on his mission of mass murder.

But there are those who disagree, who see this atrocity as part of a wider conspiracy — or, perhaps, as a convenient stick with which to beat their political and ideological opponents.

One example: The New York Times last week ran an editorial arguing that Anders Behring Breivik was “influenced by public debate and the extent to which that debate makes ideas acceptable.” The “broader” issue, says the Times, is that “inflammatory political rhetoric is increasingly tolerated.”

Which raises the questions: Who decides what constitutes inflammatory rhetoric? And if such rhetoric is unacceptable and intolerable, who should censor it and by what means? (Memo to young readers: Back in the day, great newspapers were defenders of free speech, including that which some would see as inflammatory.)
Great piece. Coolly reasoned. RTWT.