That is called freedom. In America jokes and stuff like that, no matter how offensive and to who, are protected by our fundamental rights. As is your right to speak out against them. And yes, some racial (all races) jokes are funny. Just as some religious jokes, homosexual jokes, and knock knock jokes. I am guessing that you are in your 20's and when you are in your 20's liberalism is exciting. It's when you get more life experience that you realize how idiotic it all really is. Live your life dude. Don't worry about social injustice. It will always be there.