HN really doesn't need to politicize the way a 24 hour news organization might. HN is a tech resource, with tangential angles into political factoids. It isn't a journalistic news outlet with a tech blog. While there should be responsibility, focus is more important.
With that in mind the tide here is overwhelmingly non-racist even if not precisely anti-racist. Racism is swiftly downvoted around here, and not readily preserved.
Opening up racial discussions is downvoted, because unless an article and discussion is patently race oriented, it's probably going to politicize and steer discussion away from tech details and into a sociological premise.
Meanwhile, the race politics that do get discussed are almost invariably the familiar territory of how bigoted America is. It's rarely any other sub-topic of racial discussion, and none of the discussion that occurs here solves a problem or highlights surprising facts.
Turning this site into the frontlines in a war waged by either side, will destroy the site. Battlegrounds, after all, are not beautiful places.
By choosing to foment strife, before doing so, ask yourself if your taking something away from more enemies or friends.