If this site ever was anti-racist, that must have been a long time ago. I threw away my old account many years ago only to come back with this one (because it's difficult to completely ignore HN if you work in tech) and the reason I threw that one away was in part the overwhelming reactionary bias in this community.
The "progressives" were at best silent "don't rock the boat" types more inclined to insist on civility than to challange reactionary sentiments while the reactionaries ranged from dog-whistling to outspoken, across the entire range of white supremacism, sexism, homophobia, transphobia, antisemitism, zionism and so on. The only comments that would ever get flagged or downvoted were those that were explicit enough to be seen as "impolite" because they happened to spell out calls for genocide or violence rather than merely gesturing at it with the thinnest veneer of plausible deniability.