Jon Del Arroz is a serious science fiction author. And by serious, I mean he's taken the time and trouble to join the Science Fiction & Fantasy Writers of America guild, something I've bothered to do, and now probably never will.
Del Arroz, an Hispanic, was planning to attend Worldcon 76, when he received notice that they were disallowing his attendance, stating he had intended to break their code of conduct. "Worldcon 76 strives to be an inclusive place in fandom, as difficult as that can be, and racist and bullying behavior is not acceptable at our Worldcon."
Because nothing says inclusivity and anti-racism like banning an Hispanic author from your event.
What triggered this reaction? What was it that Del Arroz had done to merit sucha response? Had he published a political manifesto? Posted with a frillion AK-47s on Facebook? Publicly burned a picture of Ray Bradbury?