I can understand Defending bad people. He is railing against freedom of injustice. I understand being abusive. He is feeling hopeless. I haven’t seen Harassment so I don’t know what to make of it.

He seems to walk the path of purity of ideas. And may come off as aggressive. As a by product, he may also be aloof from the career ladder. His trust in being nice to people is broken (autism?).

He has some good civil rights stuff https://www.stallman.org/