Neil deGrasse Tyson: "There's nothing you can ever tell scientists about the natural world that will hurt their feelings."
Grim Dark Future Hat: "Blacks have lower average IQs. Your move."
Guess there's reasons not to invite speakers notorious for advocating racism against fellow conference-goers and their families! [1] (And why one hires knowledgeable diversity consultants who've seen these dynamics a thousand times.)
[1] "It was really quite lovely. Later that day, in the jeep to the ranch house where everyone was staying, he started up with the casual racism, and everyone ignored him." (https://twitter.com/maradydd/status/606799534983770112)