But, it's ironic (and sad) that the same person who raised the issue of diversity in speakers - who would have been the first PoC doing a keynote - was treated like rubbish and essentially pushed out to the point they no longer feel comfortable being part of it at all. It's also interesting to note that while the issues the voting body had with their talk was solely to do with the content of the talk, it begs the question of if any other participant would be treated the same way in dealing with that issue arising. In my experience it's not uncommon for that sort of irony to play out, but that's purely anecdotal.

Also, of course white is a colour but I've always seen PoC as a slightly more language-open alternative to the previously commonly used "non-white" which feels notably like language from an era long past.