Assholes. Get in an argument with someone, prove them wrong, and the kike jokes come out. Or how about the one about Asian Women in reference to my wife? Or how about the 60 year old moustachio'd asshat who tried to convince me that Jews brought every suffering in history onto themselves? And on and on and on. You start with the "jokes" and at some point the common dialogue turns to more serious bigotted ideas.
Political Correctness protects the "exotics" from the hateful majority. Genocidal justification starts with "jokes", becomes "conventional wisdom", and ends with "action".
There are plenty of ways to joke harshly with someone without falling back on unoriginal racial/religious/sexist slurs. Why not get personal instead? Personally I like to insult dude's manhood, looks, and intellect. When I'm feeling frisky I go after their life history, eating habits, etc. Good times