Self explanatory, what do you think about black-washing anime characters?
Personally I believe it's taking away the representation of Asian culture. It doesn't matter how much you want to see someone who is of color.
A common character I see that is black-washed is Izuku Midoriya, also known as Deku. He is a character from My Hero Academia and the protagonist. 'Everyone' seems to get offended when someone white-washes a character but not black-washing? They all tend to turn a blind eye. Funny. You will most likely not see anyone make a part two of any movie from the main character going black to white. Everyone would go nuts. "Oh my god, they are racist, they made him white in movie two!"
What's the difference? If you take away someones representation but get offended at the other you are a hypocrite.