A countries History/Legends/Mythos/Religion can fall into multiple catagories.
Are all tales about romulus and remus true?
What about stories of Leonidas?
What about any number of religious figures?
Why is it only white history/myths/legends/stories that have to be changed to include some "people of color" to make pretend like they actually added anything of worth to the worth. Like some how one token curryfuck would suddenly make the stories of king Arthur better?
For some historical figures, the color of their skin / race was an important part of what made that character historically relevant.
For example MLK and Hitler, if you have a black guy playing Hitler it will be a joke as one of the historical facts of hitler and ethos was aryan superiority, and you can not disentangle the two of them. The same way MLK, you can not dissociate his race/skin color with his history.
Fairy tales elements don't suffer from this. It makes zero difference to the Pinocchio story, that Geppetto would be player by a black actor.
"A countries History/Legends/Mythos/Religion can fall into multiple categories."
one actually happened (history) while the rest is made up garbage. You are forgetting that very important part.
Historical figures in which the skin color are not a part of the historical value can be represented by a multitude of actors.
For example a black actor can be casted as General Patton in a WW2 Historical piece, why because racial identity is not intrinsic to General Patton's story and historical significance.
It would be impossible to cast Abraham Lincoln as a black actor in a historical piece and not have the narrative fall apart.