Doesn't seem worse than Reddit or Facebook to me. Heck, even though it isn't as obvious the amount of negativity on HN about everything Chinese is basically the same racism, just written in ways to avoid getting removed.
Did you visit the site? They have multiple boards on the sidebar that are explicitly dedicated to racism. One of them is just named “[Nig]s”. There’s a picture in the sean one with a 1488 behind pixel black people.
What's the difference between being racist with the intent of offending ("triggering") people vs just being racist?
Isn't most racism done with the intent of making the target uncomfortable or offended (whether that be in small ways or all the way up to straight up murdering people)? Like isn't that the entire point of racism? The KKK wasn't burning crosses to be friendly.
I'm sure most KKK chapters were actually satirical, totally-not-racist, KKK chapters. It was that oddball 1 in a hundred chapter that crossed the line that gave the rest a bad name