Have you ever read any Baudrillard, Derrida, or Foucault?

The commonly understood postmodern is not actual postmodernism.

For example, climate change deniers reject science, but they do so like a bunch of dumbasses. Trump fosters alternative facts, rejecting any authority which might question him (journalism, judges, the FBI), but he has a brain no more capable than an invertebrate.

The folks who understand actual postmodernism are neither dumb nor Republican.