So I just listened to Kara Swisher's interview of Ben Mezrich, author of "Breaking Twitter" which is out now I believe. Mr. Mezrich does not believe that tolerating racist people, turning Twitter into a firehose of racist conspiracy theories, and grandstanding for the worst white supremacists on the planet makes a person racist. "It's so complicated," he said to excuse leaving most of Elon's racist tweets and bigoted antics out of his semi-satirical book.
But it's not. As Kara points out, racist posturing by insincere people who should theoretically know better is, in some ways, worse than sincere outright racism. Either way, it's definitively racist behavior.