That's a big accusation. Was there proof besides the tweet shown? (Which didn't say whites etc can't apply) If so yeah that's messed up if not then it's kinda overreacting.
(also, ftr, "blue tick mark twats" makes your point sound worse)
Hmm, idk, to me that just is letting the type of people who usually feel they can't get into something like WotC know that they have a chance. Like it doesn't make me (a cis white male) feel I can't apply.