There's no use in trying to explain. I'm being downvoted to hell for trying to explain why racist jokes are not ok, with replies like "this is just an off-color joke" or "do you know what racism means?" . I'm pretty dissapointed in this community, been here for lots of years and thought that generally speaking people in here would be more open-minded. But the minute you start to explain why making jokes about one's race or incurable disease is not ok you realize you're in the wrong group.
It's a weird, weird world when "open minded" means "likes to participate in mob justice".
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.
In all honesty, you did a really poor job explaining why racist jokes are bad. You're being downvoted because (1) you assume that her joke was racist, and (2) you assume that racist jokes are bad (without showing understanding or "open-mindedness" about people who think otherwise).
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.
