Is Disney editing their own works or merely offering disclaimers? And if they are editing some offensive scenes, won't future generations be the better for it? Do we really need to continue showing hurtful stereotypes? What is to be gained?
Disney rarely wrote original stories for their feature-length animated films. Existing folk tales, fairy tales and published stories were rewritten, got some added spin and plenty of cultural biases (there were no crows in the original story of Dumbo), then turned them into those now famous cartoons.
As for burning history books and works of art, there's a big difference between rewriting history and choosing which contributions to honor and celebrate with statues on public lands.
If I were an African-American I would find statues of Confederate generals even more offensive than I find them as an American of European ancestry. After all, these officers were battling to continue the horror of owning and enslaving human beings. There's just no way to pretty that up.