Trouble is, if she admits her mistake then she reveals her own racism. She really did assume that someone with an "unpronounceable name" (her words), frizzy hair and nicknamed Archbishop Desmond Tutu was a black woman, with no further descriptors we are aware of. It is an embarrassing blunder, but backing down as soon as HarperCollins clarified it, she could've saved face. Nope, she wants to further cement her racism. Well, that woman I've been told is white looks suspiciously dark to me, I think she is a black woman. Look at her skin tone next to this other character. (None of this is word for word, but we all saw the tweets)
As always, she's being offensive and insensitive. Jack, you don't get to label people, even characters in someone else's book. It's gross.