I only realised it today but my friends are really racist!  

Example:
My friend: Yes! i got a 75 on my test, what'd you get?
Me: 87 percent 

My friend: Shut up, or we'll put you in the gas chamber. 
My friends always call me "the jew" cause of my hair, even though i'm not jewish.
I never say it,  but that's really mean, Hundreds of people died in those gas chambers and he's joking about it?
Another thing:
My friend sees a picture of an african american person celebrating after winning a race, and he says
"KFC must have opened"
I really don't know what to do, Beacause any time I try to tell him that it isn't cool he just says "someone can't take a joke"
*sigh* I need some new friends.