It was banned because of its inherent white supremacy, correct. But don´t forget, this was made in 1933, the dawning of Hitler`s Aryan supremacy campaign, so Im sure that it was a very sensitive time, too. I honestly dont think it was the intention of the animators, Cab wouldnt have dug the idea that. Remember, he put together the very first all black musical, stormy weather, under fierce pressure