This is the second Twitter user I've seen that openly hates people posting his tweets here. Both are non-traditional genders, maybe that's a relevant factor.
Edit: for a second I thought the tweet referred to Ubuntu.com :P
Not blaming you at all, but understand that's why many people feel like Twitter is a shithole.
These are not the same.
There are a lot of people out there with real problems -- approximately none of them give a shit about hacker news.
That being said I am white and male and probably not who you have in mind. HN being white and male is probably more of a thing about it being aimed at programmers than anything else, plus I have a pet theory that something about the male personality values talking nonsense all day about things we have no control over (i.e. Why is Reddit male dominated? The subs I go on are full of completely sexless nerdtalk about politics for example)
because people are actually racist/sexist, or they're not progressive enough?
People of color around the world have opinions about race, gender, etc which I think would offend you. Some of their countries even have laws, language and cultural traditions that are completely against your own values.
Also, perhaps it's very difficult to avoid becoming reddit when controversial topics are present? Which comment forum do you think gets it right and what's their secret?
Why?