We got into this great discussion very early in the life of this message board about what makes funny things funny.
It was JUST like this discussion except it was not sparked by a statement that, out of contest of the achewood strip, is offensive to some/many people.
The problem is that language between two people can be a surgical instrument of precise intent and meaning (like, say, to an attorney like the inestimable Mr West) but that, as the audience grows, language becomes a blunter object because so many people interpret it in their own way. This is why humor intended for the masses is likely to offend some people: it turns on language, and although we share a common language, we don't share the most important aspects of how we process information - our values, our knowledge, and our experience. So some guffaw and some walk out of the room. And it's OK to be in either group as long as you acknowledge
1) a person's right to make potentially offensive statements,
2) the listener's right to react in an appropriate way to the statement and 3) the responsibility of the person making the statement to understand both groups of people and, when necessary and/or appropriate, acknowledge a statement that should not have been made and make things right in whatever way is appropriate.
It would be neat if people took responsibility for things they say but they don't.