Forums like this are "censored" and that's a really good thing. We don't need a steady stream of (for example) hate for women, minorities, and trans people that you see on truly uncensored forums.
I agree, but when that is abused because of a minorities' preference, then it's bad.
That's what's happening here.
All illegal speech should be hidden from public discussion.
However, it would be disconcerting if stating biological facts led to censorship on a forum that focusses on science and technology.
The definition of "hate" has been stretched a lot over the last few years, and if that restricts discussion of facts and ideas, then it is harmful.
This is correct. For the people who disagree, go read Slashdot at -1 for a while. Then pretend that you're one of the people who are targeted by that vitriol, and think about how much you'd read the HN comments if they were like that.