I mean, not for nothing, but do you think there's a reason we don't tend to get films made depicting happy people singing with animated birds, but set in Third Reich Germany?Reconstructon or not, slavery or at least the attitude toward it, was still around. And, being a movie that was from Disney, I'm sure the point of the movie wasn't to show the grim reality of slavery, Reconstruction, or whatever..... the setting of the movie was about that. Once again, being a DISNEY movie, the focus was on positivity, life lessons, characters, and songs. Oh, and it is a MOVIE. At the end of the day you have to remember that. That's with ANY movie. It's not always about reality.
When I saw this movie I already knew about how things were in those times from school and my parents. I knew it was bad times and unjust. But it sure was nice to see a movie, even set in those turbulent times, bring out a little positivity and memorable characters.
I guess The Sound of Music shows a mostly happy world, but much of its dramatic tension, particularly in its second act, is at least built around acknowledging and confronting the very real dangers and terrors of that era. Given that the NAACP even criticized SotS upon its initial release, these are not new criticisms.
EDIT: I also keep seeing people saying that Disney "gave into the mob" or "the outrage" or whatever, but can we actually see evidence of widespread, mainstream calls for the removal of the Brer Rabbit story from Splash that got any traction? As of now I don't see a reason to doubt that Disney had this planned back in 2019, given the detail in the concept art, so I'm not sure where people are getting that from.