Why are we more protective of the colored folk?

I am fat and hear insults all the time. I don't care, cause i know they just playin. we all rag on each other, and its all funny. heck even i make jokes about my own self. and you can make fun of christains on tv. and be angry with them, and ay they ruin the world. but i you make a black joke suddenly your a horrible racist, and it would have been better that you had raped a child, then to say the "N". and when Mel gibson drunkingly said, the jews are responsible for all the worlds wars, everybody got their tail in a knot, but anybody can bash christains and say they will ruin the world,, and its all good?