Going back to the topic of the OP....
Yes, there absolutely is a problem with racism, homophobia, ableism, transphobia etc on MN.
I've seen posts left standing which categorise immigrants as backwards savages, the disabled as scroungers, gay couples as "not natural", Muslims as paedophiles, and trans people as predatory fetishists (not "just" saying TW are men) etc. When they're reported, MN says "they prefer these to be robustly challenged on the thread". It's lazy and shit moderation.
I don't know if it's because of ideology from leadership or because hatred and outrage generate more clicks and more money. Probably the latter.
It won't stop until it massively backfires on them, for example if someone in the public eye sues them. There was an awful incident last year or the year before where FWR went after a female runner because they saw an unflattering photo of her while she was running and decided she must be trans (she wasn't, she was in fact actually female and a mother of four children as I recall). Apologies were posted but the whole incident has been scrubbed from the site.
One day MN posters will go after the wrong person for whatever reason and MNHQ will be in the firing line.