Some of the race swaps are merely unnecessary, but this movie is clearly set in scandanavia. That means: no blacks without an explanation.

It's considered "white-washing" to have a white actor play a middle easterner or east asian, which you can at least make the visual case for. She doesn't remotely pass as scandinavian; this is "black washing", full stop.

Edit: And it's a nobody actress. At least White Moses was Charlton Heston, a highly acclaimed actor, not some scrub off the street.