What's wrong with a black elf?
the creation of something that does not exist… I think this is something that offends black people more. Like Marvel's lie in the Black Panther movie, "We have exploited you for centuries, here we are giving you a modern city."
Elves are fictional beings, no?
Elves were described this way by Tolkien. https://image.nostr.build/7eed7f643a882eabfa3387498c1a5a7f9a3103c1c8b7144fed6c366a6ed954ae.jpg
True enough but I don't think Tolkien's description should lock in minor characteristics of elves forever. Their skin tone isn't central to their description/identity. On the other hand, if you tried to portray an elf without pointy ears I'd fight you.