Having people of different appearance and culture is a great thing, it's only those who are too narrow minded to see past skin level or "oh, they don't talk like me" that make it an issue.
I really wish the area I lived in was MORE diverse as it's about 50/50 white/hispanic and I never got the chance to grow up around more black/asian/middle eastern folk which is a shame. I think that my generation, for the most part, has grown up without seeing color, which is a step in the right direction. I work with a black guy, one of the only ones here and he's been a good friend. I just wish there was more variety in the wimmens around here, I get tired of the same 'ol same 'ol constantly.
I look like a Cherokee indian for the most part (and sort of am), especially since I grew my hair out and I love it. All the hispanic chicks dig on me, probably because I look more like them, so that's a bonus, and yet I more often that not have ended up doing things like Prom and more serious type stuff with white chicks. I'd like to be around more black women as I find them extremely attractive, and yet I foresee myself marrying an asian woman. Fuck, I love diversity.
And yeah, it's fun to joke about too, because really, there is NOTHING in life that anyone should ever be offended about. If you ever feel upset by someone's comments or guilty about your own, that's just not right. Really, we've come a long way, the 60s weren't that long ago and people need to realize that despite a small group clinging on to the past, America has made pretty amazing progress over such a short period of time.