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.