draw your own conclusions from this
When Disney bases a movie on a story or tale that was already established, they make the characters the same race as the people from the region it originated. When it’s not, they make it however the writers feel it should be.
Rapunzel is white because she is based on the Brothers Grimm story where she is German, which in turn is based on a tale from the 1600’s. Frozen is based on a story from Denmark written in 1844. Jane is white because in the original story, Jane is white. Changing their races would be just as bad as white-washing Jasmine or Pocahontas.