There is a trajectory of socialism, regardless of the good intentions of many socialists.... [Y]ou take things such as health care, things that are traditionally understood as within the ambit of individual liberty and free choice; you move such things into the ambit of state responsibility as the welfare state emerges and grows, on the theory that it is government’s responsibility to provide for everyone’s needs (by redistributing resources); as more things are moved from private to public control, the state by definition becomes totalitarian; and, inexorably, the totalitarian state gets bad leaders and the society comes to reflect the policy choices of those leaders.

Now, we can argue until the end of time about whether that trajectory really exists and whether it is inevitable. But however you come out, it is an argument very much worth having. It goes to what kind of society we are going to be, to what the proper relationship between the citizen and the state is.

Nazi Germany is a useful historical example of socialism run amok. The genocide and terrorism ultimately practiced by the Nazis were horrible — that goes without saying. But National Socialism went on for a dozen years, it was the last stage in a progressive nationalization of German society, and there was a lot more to it than genocide and terrorism. It cannot be that because there was genocide and terrorism, the socialist aspects of National Socialism are outside the lines of acceptable political discourse. Given the immense popularity of Jonah Goldberg’s Liberal Fascism, one of the most important political books of the last quarter-century, it doesn’t look like Americans are as convinced as Mort Kondracke seems to be that these comparisons are verboten.

[...]

National Socialism is banned from the Right’s case against socialism, but is somehow acceptable when leftists use it as a smear or when the Left’s nuanced geniuses, after their very thoughtful consideration, decide its invocation is suitable for mature audiences? I don’t think so.