The first problem with Song of the South is that it never makes it entirely clear what the relationship is between the black and white characters in the film.
The closest the movie comes is when, 10 minutes before the film is over, Uncle Remus decides to leave the plantation.
While the movie is supposed to be set during the era of Reconstruction, it never comes out and simply says this.
Many audiences have viewed the relationship between the black and white characters as being that of slaves and masters, and there’s little evidence to discount this view.