Generally I don’t say much about the racist, sexist, and classist attitudes found in much of J.R.R. Tolkien’s fictions, as I would think by now that it should be apparent to 21st century readers, but Requires Only That You Hate
(one of my new favorites to read because her takes on social/cultural issues in genre fiction and video gaming often makes me reassess my own views) has written a piece on those odious elements in Tolkien’s work that is well worth reading. In particular, her comments on Tolkien’s analogy of his dwarves having “Semitic” qualities to their language and their wanderings is very well-argued.
Although I don’t mind people leaving comments here, I think it’d be best to leave comments at her blog.