It's important because it is a dictionary defined racial slur, and the word "redskin" has a negative connotation that a large group of native Americans find offensive. There wouldn't be a team called the "San Diego Caucasians" or the "Pittsburgh Negroes" or the "Kansas City Jews". The word "redskin" offends and insults native Americans just as much as the n word does to blacks or the w word to Latinos. The NFL's Washington Redskins name should be changed