I've been pondering overnight. And at the risk of getting shot down from all sides, here's my view.
The most overt racism I've seen on FWR has been the false comparison between TW and black women (sort of: if you can exclude TW, it is a small step to excluding black women).
The Disney thread linked to originally is problematic to me and I dipped in and left it. Should black people (or women) get more representation in films? Yes. But for any existing series, swapping a character from white to black or male to female may or may not 'work' for people invested in the series due to overall series consistency. I don't think it is 'wrong' to have that discussion as such, especially when it relates to 'identity politics'.
Then there is the word 'woke' which clearly has different meanings in America than it does in the UK. I can well imagine therefore that using woke as a pejorative in the USA may be seen as racist whereas in the UK I genuinely believe it isn't generally - as in the word woke is not defined including race and people don't use it as such.
I have seen similar problems on how disabled people are referred to with occasional US posters using terms acceptable in the US which are unacceptable in the UK.
This then leads to a bigger issue on MN. MN is primarily a UK site. By that I mean its roots are in the UK and the majority of its posters are in the UK. The narrative / background of race & racism are different between USA and UK. You can't just take USA politics (and how they respond to race, TW, abortion) and plonk it down in the UK. It doesn't work.
I am sure there are covert racist posters on MN. it would be surprising if there weren't. The difficulty is identify what posts are due to racism v other reasons. Meghan Sussex is a great example. Some people may dislike her because she is black/mixed race. Others may dislike her for encouraging Harry to split from his family, going on Oprah etc. Unless people are explicit it is difficult to me at least to discern who is who.
So many of the women supported by FWR are non-white of which I guess Allison Bailey(sp?) is the most obvious. It would be strange if FWR was particularly more racist than anywhere else on MN.