Is AUTHOR wrong in the post ? POST : I work in a very close team where we go for happy hour a lot and we make a lot of jokes as well. I'm the only black person in the team and some of my teammates either think all black people look alike and they get offended when I tell them that it's kind of racist to do so. 

To give a few example: 

* We had one other black person join our team for short time and they used to refer his as my cousin even if I told them not to do so.
* When we go outside for happy hour or some other team activities they will see any random black person and say either he looks like he is my brother or something like that

I don't think they do this to offend me or something, but I couldn't let it slide either and I started to feel like I'm policing what they say. How would you handle this? am I being overly sensitive and fallen into the PC culture?