Post-Modernism—Just Like Zyklon B?

More bizarro Pope-inspired Nazi analogies from The National Review, this time directed at you atheists and Objectivists out there:

Well, obviously there are atheists who have a strongly reasoned, and as they see it "objective" moral code based upon reason. They are not relativists. But there is now again, as there was in the 1930s, a spreading invisible gas of relativism, even among such atheists, not to mention among former believers in God. For growing numbers, it seems, ours is becoming again "a world in which everything has lost its meaning." The academic fashion of Post-Modernism puts an ideology to this, and its roots seem to me much too like those that led up to the fashion for Fascism and Communism among "the Clerks."