apparantly, these people have told him they are offended, or at least that was my interpretation.

I don't find it that hard to not be inconsiderate of others. A simple, obvious example might be to not make black jokes around your black friend (simply as a clear and obvious point) who is offended by them. That's not too much to ask, nor is it difficult, and it's nothing more or less than simple courtesy. Or telling gay jokes around your gay friend who is offended by them. Why is this so complicated and unmanageable? That makes no sense to me.

I mean, maybe I am misunderstanding and he's not telling jokes he already knew or pretty much guessed would offend, if so, then my points are invalid, because they are based on the idea he is making jokes around long time friends who he should know what kind of sense of humor they do (or don't) have.