Song of the South contains the trickster tales from various African folklores. Rabbits are common trickster characters and Brer Rabbit is a trickster character that was brought over from parts of Africa because of the slave trade and incorporated into American folklore. A white man created the character of Uncle Remus and published a series of books that were tales that he heard from persons of color after the Civil War and through the Reconstruction Era. So, already, you're dealing with a white man profiting off of culture that is not his. That he also wrote the dialect as his interpretation of --gods, I hate even writing it-- Deep South Negro furthers the problems.
Obviously these stories are shaped by the time and place that Harris lived but the whole point of progress is to acknowledge that even if he was writing these stories to showcase the struggle of the Deep South he was very specifically highlighting the 'struggle' of the plantations. You know... where slaves worked and had no rights! And even when they were working on this film there were problems. The man who wrote the screenplay was told by the Hays Office that some of his terminology had to be removed. That was in 1944! Disney hired another guy to work with the screenwriter to help combat the 'Uncle Tomism' that the first guy was bent towards being from the South.
The entire history of this film is fucked up. It really is. The stories themselves are wrapped up in some seriously messed up cultural morass. Folklore is a hobby of mine, I am by no means an expert, but I know what the characters are in that tradition... the trickster and the antagonists trying to trap him. The Laughing Place is a quintessential trickster story and that's fine but it's still wrapped up in a fucking NIGHTMARE of cultural grievances and, ultimately, these are stories that slaves brought over that wound up benefiting white men. Then you have the situation where James Baskett, who played Uncle Remus in the movie, was voted an honorary Oscar which made him the first African American man to be awarded the Oscar and it's just like... the whole thing is a mess. It's just a mess.
Are there good things about it? Sure. But there are so many problems that outweigh them it's just... ugh. Ugh. I'm so glad they're changing Splash Mountain. I really am. The retheming will work perfectly in Disneyland as it's right next to the Haunted Mansion which is part of New Orleans Square. Magic Kingdom isn't as obvious as far as land theming goes but they'll figure it out. I'm glad Tiana gets more room to shine.
But Disney really should come up with a way to deal with the repercussions of Song of the South. Just burying it isn't enough at this point.