Thanks for the link.
While Shetterly is a Communist, he is logically consistent. He defends due process, mainly because he’s aware of history and the use of false allegations before the Civil Rights era to lynch blacks.
He defense freedom of speech and is against political correctness, because he knows that a bunch of elite liberal bullies hectoring others for word choice and clothing does nothing to help the poor.
This is why he got banned from at least one science fiction convention by social justice warriors along with conservative hispanic science fiction author Jon Del Arroz.