Those same people would complain if there was a white casting in an african myth setting...The one with underlying issues here is you. That is all you guys can do is swing the racism bat anytime someone has a legitimate concern because you can't come up with any kind of meaningful debate or rebuttal or argument. What is worse is you guys are so petty and smug in your deliveries of them as well.
No it is not racist to be against black dwarves or elves in a Tolkiens universe. Tolkien created his universe because medieval britain/europe lacked a significant fantasy world and he based it on MEDEIVAL britain europe. Where in the historical documents do you seem groups of black people roaming around integrated into society in medieval europe/britain? I'll wait.
No I won't actually cause they never did. Africa has a HUGE wealth of their own mythological and supernatural entities, deities, being and so on and so on. Someone could do a lot with it. And you best believe, if someone made a mythological world based on african culture and there was a white zulu warrior or something, and someone had a problem with it, id be right behind them saying they have a legitimate concern and it should not be. There should not be black dwarves or black elves, just like there should not be white zulu warriors or a white mythological person in africa in medieval time. Stop using the racism/sexism/bigotry blah blah blah crap, you are only projecting.