My daughter watched the entire movie on YouTube a year or so ago (she was 11). It is her considered opinion that anyone who finds Song of the South racist is an idiot.
It’s a wonderful movie. Uncle Remus is a very positive character, the story takes place AFTER the Civil War so it doesn’t depict slaves, and the nastiest characters in the movie are two bratty little white boys. The fact that it goes unreleased is pure political correctness.