JDKJ said:
Read Tolkien. He never said the Hobbits are "white." According to Tolkien, the Hobbits are multi-ethnic or multi-racial (i.e., at least of various skin tones, ranging from "brown" to "fair").
Honestly, i don't really really care what Tolkien said, the umm... short candy making guys in Charlie and the Chocolate Factory were originally black and I believe from Africa so I give the film maker all the right to change things, but fair and browner doesn't seem like he meant for them to be a melting pot of culture, and that is what most current day viewers will, at least subconsciously, assume.
Edit: The film maker should just do what he wants and not worry about what people think, fantasy shouldn't have to bow to political pressure because it doesn't have the merit that other genres have.