His crime? Writing a female character who goes on the run, has limited food, and trains in martial arts--which leads to her losing weight.
This was, apparently, fat-shaming and deeply sexist.
The authors involved in these threats and book-burning talk had literally no punishment. None. Just a bunch of new followers who gushed about what "strong women" they were. (As a woman, I can't think of anything weaker than threatening to burn a book and harass someone, all for internet points.)
The thing is, Publishing Twitter is super safe if you're on the far left. You can talk about harassing people, burning books, and purposely destroying careers. Zero consequences at all.
But if you're so much as a hair right of center left? Forget it. Your career is gone.