You've clearly put more thought into his words than he did. The guy basically had to admit to knowing nothing about Marxism in his debate with Slavoj Zizek, nor could he give a single example of one of these post-modern cultural Marxist that have apparently taken over higher learning. Not to mention post-modernism and Marxism are essentially mutually exclusive.He just means patterns of thought influenced by deconstructionism in postmodernism and the material dichotomy from Marxism, which is pretty much the basis of much far left thinking. The fact that Derrida didn't talk about college campuses or whatnot is beside the point.
He's using buzzwords to rile up ignorant rubes against leftist thought because it scares and offends him.