I'm the asker of the original question, and I actually agree with you on a lot of this. As soon as I read @fragileone and @iotku's excellent answers to my question my heart sank a little at the thought of a site even more racist than YouTube. Almost every site that pops up claiming an anti-censorship position is quickly filled with pretty abhorrent content. Downvoting someone on HN for pointing it out doesn't make it untrue.
It gets filled with all kinds of content, of which racism and other far-right talk is merely the most visible part because it's in the spotlight. But it's not just far right that's getting "deplatformed". Even politically, there are plenty of leftist groups that were wiped out from e.g. Facebook during the recent purges. All those people also have to look for other platforms.
I'm not saying there aren't other valid uses, just that racism is pretty much guaranteed on a no-censorship site. It _should_ be something that we can all agree on as being "bad", even when dressed in its Sunday best from the likes of Jordan Peterson.
We can agree on it being bad, but that doesn't necessarily mean that we have to censor it, and especially so when such censorship has an already-demonstrated tendency to quickly expand in scope.
