From the article - "[2021 update: I no longer contribute to Racket due to abuse & bullying by the project leadership. Everyone in the broader Racket community, however, has always been helpful and kind.]"
He actually attributes malicious intent ("campaign") to this other person. Based on no evidence whatsoever, just feelings apparently. The apology was gracious, forthright, and entirely believable. The guy is uptight and blows up. Does that make him a "bully" who "campaigns" to harrass other people?