At the same time, Walt Disney was not racist (although some crazy people like to claim so). Second, half the cast as well as the voices for all three animated characters were played by black actors. Also, the live version of Br'er Fox and Br'er Bear were played by white kids who were made to look dumb.
Yeah the tar baby scene could be seen as racist, but I'm sure that Disney had another reason for that (possibly satire?). Why would so many black actors and voice people sign up to do a movie that was racist against them?