Can I be upset at all of them? The little mermaid should probably be Dutch, and all the rest should be their canon ethnicities. White Disney princesses don't bother me because most of those stories are European folktales, but that cuts both ways.
Trace her back to her origins, and she's literally based on a Danish folktale. I can guarantee you no one in Denmark when the story first was told was thinking of her as black.
But then I think all of those examples were bad and should never have been cast that way. A black Anne Boleyn is exactly as bad a choice as a white Mansa Musa, for example.
Yeah it'd be a similar reaction if Jasmine & Aladdin were recast as northern Europeans. Sure it's a fantasy tale, but the story is set in a fantasy version of Arabia.