Ummmm... pretty sure that Nazis are universally hated. Changing Nazis with a racist phrase completely changes the dynamics (and intent) of that quote. I really think you're reading into this a little too much. I have absolutely no issue with what Glee did. I even laughed when I saw it (yup - I just admitted to watching Glee).
However, I don't want to argue with anyone. The posters arguing this subject has been entertaining enough. Please continue!
Criticism may not be agreeable, but it is necessary. It fulfils the same function as pain in the human body. It calls attention to an unhealthy state of things. - Winston Churchill
President of the "Nolan Smith Should Have His Jersey in The Rafters" Club