Originally Posted by
Arutad
What's the difference between a white man and a black man? Skin tone. That's what sets them apart initially, that's the mark by which people were socially separated in past. The existence of different mannerisms and all that is a direct consequence of having been socially separated, otherwise cultures would've gotten merged.
And jokes that laugh at stereotypes are always offensive to those who get laughed at. You may imagine that you laugh at something innocent, but try to make such a joke in the face of whom you're laughing at :D I don't think they'd ever buy your words "But wait, I'm not laughing at you, it's only about mannerisms, speech, cultural differences". Because you do laugh at a group they belong to, and in an offensive way.