This is me weighing in on this, so feel free to ignore, but the situation might be more with the fact that there is an unintended implication of people saying what think these characters as these people of these particular groups should look like (ex: darker skin) which is already a stereotype of its own when most people default to dark skin instead of showing varying skintones. Not to say there aren't any issues, because this is clearly a colorism thing. But it's also best not to say much about it from an outsider point of view because of how it has affected people irl. So it's a bit of a sore spot when people not of this specific culture weigh in with their criticisms like this.