...unless you standard for "affect" covers all communication. In which case, you're saying "People should pay for the sin of expressing an opinion or making a joke".
...and perhaps you are.
Have you ever been the victim or racism? If not, let's say you're in an open group, you're of a certain nationality (let's call it X), and some other member of that group starts making racist or xenophobic jokes about your race/nationality.
By mistake my skin is white (so I've never been the victim of racist jokes/looks, even though my brother, whose skin is browner, has been a victim of said racist jokes), but being from a not-so-important-East-European country I've been the victim of xenophobic remarks/jokes coming from people "with the best intentions". They always, I mean always, hurt. It also hurts me why I have to explain on HN why racist jokes hurt people. I've been in this community for lots of years and never thought I'd see this day.
Are you serious?
That white people couldn't be victims of racism? That only white people can be racist? You've never met even just funny looks? Then you haven't been out to the world too much.
I'm a big, white European, and when I was in China, I could hear myself being referred to as "laowai" "or dabizi". I could have gotten mad, because yes indeed by nose is big by Chinese standards and this is a reference to my racial features, but I chose to carry on. The people mostly meant nothing bad. Even the ones that actually maybe thought bad of me - possibly associating me with Western colonialism, of which I or my country were quite innocent - did nothing bad to me, so I let it be.
When our family went to the zoo, we were looking at the pandas, and a hundred people were looking at us (Look! Three white kids!). Very slow looks. It may be a bit awkward, but needs to be tolerated. I was just as much in awe when I saw the first black person in my life.
But perhaps I can do this because there was nothing I could gain by acquiring a victim identity. I'll leave getting mad to a time when someone actually tries to insult me.
And if you understand the tweet, you'd understand the she was making fun of ditzy white girls who naively assume that white people can't get AIDS. It's a caricature of racism, not racism itself.
Personally, I disagree on both counts. I like offensive jokes of all kinds (I mean, if they're actually funny). Coming from a very homogeneous Central European country, I have never been on either side of oppression (other than being bullied in school for being weak, small, smart geek), so I definitely don't have your experience of being "hurt" by jokes, but your experience doesn't translate into a universally-applicable moral/rational argument that racist jokes are bad. However, even if I agreed with you and would personally dislike racist jokes, I would still strongly oppose restrictions or censorship on racist/offensive jokes, to avoid situations like the recent Charlie Hebdo attack.