As a non American, the dichotomy that is all the rage nowadays is two camps whose position is literally just "we hate everything the other side loves".

The point of Kaczynski is that both camps are mostly composed of middle-class Western academics living a sheltered life that are deciding who is socially accepted and who need to be cancelled. Our culture wars are not minorities shouting for a better life, our culture war is made of middle-class white people getting offended on behalf of minorities. They are no Martin Luther King, no Malcolm X, they just are posers that are making the racial (and gender and sexual) divide even worse than it is, by polarising or alienating the silent neutral majority.

This is a longer argument that's put more eloquently in the manifesto than I could ever write on a comment box.