These people are not Americans. If they are Americans, they would say so and not beat around the bush with silly prefixes. These people, quite honestly, should be exported to their respective countries. People who get easily offended are also really dumb. I don't really understand this.
Jokes are just that.
They poke fun at people, things, whatever. If you look at jokes with an outside perspective, you can really find some humor in them. True, there are tasteless jokes, but that is quite a different story. Even if a joke is tasteless, you don't have to get upset about it. This brings me to my next point.