I just watched this documentary - http://www.imdb.com/title/tt1330059/
- and was very surprised to learn how Muhammad Ali basically turned practically his whole race, as well as others, against Joe Frazier. I have subsequently lost a lot of respect for Ali. He even goes so far as calling Frazier an "Uncle Tom" and a 'gorilla'.
If that was a white person saying that, the repercussions would have been enormous, even back then.
I recommend anyone interested in boxing, Ali or Frazier or just looking for an interesting doco should watch this.