Felleisen is an academic, and his behaviour is very common in academia. It's trivial for college professors to get away with bullying people. In comparison, the software industry is relatively friendly and rewarding.
He _wants_ to be ignored by reasonable people sometimes. So he can continue being an asshole to some individuals whenever he wants.
What he _needs_ is to be uninvited to conferences, and pushed out of leadership positions in projects.
(And Linus circa 1990 thru 2018 or so is a counterexample to your second sentence...)