Lord of the Rings - Is There a Type of Dwarf?

I think there's a quadrant of people that have reasonable questions as to why there is more diverse actors in the show. But I think so many people are just like, I want Middle-Earth white because it's always been white. The justification they deploy is that Tolkien imagined this whole universe as a prehistory of Europe. If that's true, then I guess it would have been mostly white. And it would be bigger than that. There's deserts and Southlands. And it goes bigger. Well, but that's the argument is that if you're gonna bring in darker skin people, there's nothing wrong with that. But make it make sense. It wouldn't be more offensive