Personally, I like the diverse cast. As I posted here, it's entirely consistent with canon for ME to have a diverse population
Let's put it this way: Amazon could have made it reasonably consistent with canon for some casts like Disa or Arondir, quite simply with a few explanations, if they had bothered. But they didn't. They could have had Disa come as a noblewoman from one of the (south)eastern dwarven nations, for example. They could have characterized Arondir as one of the Avari, who had moved south instead of west very early in the history of the
Elves, and so on. But they didn't. You could have made the real southerners and
Haradrim and the people of
Rhun more of a theme. But they didn't. The series' "southerners" (from Pre-Mordor) even look like white Europeans for the most part now. (And apparently have Irish or Scottish accents, too?) What's the point? They should look more like someone from southeastern Europe or the Middle East and not like Scots or so.
Obviously they didn't want to show realistic diversity in a plausible way, although there would have been a lot of possibilities. I suspect because, first, they didn't know anything about history and lore, and second, they just had to fill their given quotas more or less at random, and third, because they have absolutely no idea what the real world is really like (or looked like in historical times, which is much more important) - they probably only know California. And I think a lot of the average viewers (with a school degree) will kind of realize that, too, even if they have no idea about
the Silmarillion.
No matter what people or culture, despite the very different origins and climatic conditions in which they live, all
peoples look the same and yet not the same. They are all randomly mixed according to Amazon's quota.
Criticism of this has nothing to do with racism: For anyone who knows a bit about history and
places some value on authenticity, the immersion is destroyed.
This is noticeable even to those who have no idea about
Tolkien: Why is there racism in the series between Numenorians and foreigners, although on average there seems to be no difference. There is also apparently no difference between elves and humans beyond their pointed ears. Makes no sense. I hope that in future episodes at least immortality will still be an issue, as this is ultimately the most important factor in all of
Numenor's conflicts.
By the way, I also subscribe to several black YouTubers, some of whom are also very big Tolkien fans, and they sometimes get the most upset about the diverse cast. What would these mainstream media that are insulting our fandom have to say about that?
In the end, it's just a welcome and cheap means for them to discredit any form of criticism. The fact that a very expensive series is simply badly made probably never occurs to them, and who knows how much money was transferred for benevolent reviews...
So whoever criticizes the series is a racist. It's as simple as that. For some at least - but they have too much to say in the mainstream.