Let's get this straight, Mr. Eugene Robinson of the Washington Post-the right wing commentators and the Tea Party are responsible for all domestic terrorism, and the left has done nothing to encourage terrorist behavior; funny how leftists never see themselves as guilty of anything.  In his Op Ed piece, The Hutaree Militia and the rising risk of far right violence, Robinson summarizes:

It is dishonest for right-wing commentators to insist on an equivalence that does not exist. The danger of political violence in this country comes overwhelmingly from one direction -- the right, not the left. The vitriolic, anti-government hate speech that is spewed on talk radio every day -- and, quite regularly, at Tea Party rallies -- is calibrated not to inform but to incite.

Demagogues scream at people that their government is illegitimate, that their country has been "taken away," that their elected officials are "traitors" and that their freedom is at risk. They have a right to free speech, which I will always defend. But they shouldn't be surprised if some listeners take them literally.