I saw some allegations in https://meta.plasm.us/posts/2019/09/01/jdg-and-the-fp-commun...

All of this stuff is really mild. If this is the best they've got then I don't think John DeGoes did anything wrong. This deplatforming seems like a silly thing to do.

Basically, they're saying that he _allowed_ people with what many think are unpleasant views (on matters unrelated to Scala!) to speak at other conferences.