Honestly, take those dolls out of context and hand 'em to my kids ('cuz I guarantee you they won't experience 'em in context,) and they're just dolls. The most that would happen is they'd go hang out with the other dolls, doing doll-things. Maybe they'd ride around on the toy trains, or hang out in the fire station.
That thing on Missesdash's bookcase, on the other hand, would probably reduce my kids to tears. I'd hear about it for months as they begged me over and over to fix it and help the poor people and why would anyone do that and so on.
The only way the dolls could negatively impact kids is if some parent saw the dolls, thought "Dolls are for kids, ergo, Django is a kids' movie," and then took their small child to see the movie. Which doesn't seem all that likely.
There are good arguments on the subject, but none of them have to do with children.