"This is why all the talk about liberal incivility is such a joke. For the past decade liberals have been increasingly subjected to a brand of conservative ridicule that has explicitly blamed them for every one of society's ills, and it has come relentlessly and from every quarter of the increasingly politically dominant conservative sphere. Now that rhetoric is reaching a violent pitch -- and if Oklahoma City should have taught us anything, it was the consequences of spreading this kind of hate. Much as conservatives like to argue that liberals are guilty of the same thing, there really is no parallel to this on the left, at least not since the early 1970s. "