Aren't you imputing motives without proof ?
While I respect your sensibility, I would have made the same kind of remarks without thinking it would hurt someone. I understand it could, but it wouldn't have been my intent. Also remember that your position is very very US-centric. But I am all for communication : explain your point to the author and propose something else that is as funny as the current text.
But saying the author chose not to is simply dishonest.