[Quoth]

Correctly, the complaint of the Publisher to the RWA about the person criticising them (who was criticised for having racist employees) should have been ignored. no matter if the criticism was unjustified to totally justified. It's not part of the RWA reason for existing to police writers on behalf of a publisher. Nor can a writers' association sensibly police publishers other than issues of payment. So the RWA has showed themselves to be incompetent.
The Publisher was idiotic in their approach to the criticism.
Even assuming the actions or attitudes of the two employees of the Publisher are/were racist as the original author (it was an author?) claimed, that person approached it wrong.
So everyone looks bad, ESPECIALLY the RWA, and it seems they shouldn't even have been involved according to their rules.

Maybe the best thing is for Romance Writers in America to found a new organisation with an unrelated name.

Would anyone even have heard of the stupid publisher without this row? I mean today there is Harlequin/Mills&Boon (who probably rarely take new writers, as is the case with big 5 and other popular genres) and then Self Publishing.

I think Romance, woman drama*, Detective and Adventure/thriller are the most popular selling and hardest for a new writer to get published by big 5

No-one can give "diversity ratings" or approve Publishers either as many outside the big 5 are very niche markets, so may not seem diverse. Like someone that only publishes LGBTQI, or Hindi, or Moslem, or Celtic & Norse fantasy, or books only in Scots Gaelic, or Swahili.

(* I hate the term Chicklit)