I don't really care either about an author's belief or behavior as long as it doesn't sound like he's trying to force his opinion to the readers in his books. Maybe because I know at least two authors that are said to be great that weren't really nice people. Well maybe one was, but leaving his wife when she was ill and after saying he would get a doctor doesn't make me think he was a great person even if he was a famous poet. So we can appreciate a book but it doesn't mean we endorse the author's opinion. I don't think I want to check the background of every author I may want to read. It isn't like I want to keep tabs on their life, if I like their work, I just want them to keep writing books I like, not them to be perfect models or possible friends.
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I only read the first book of the Earthsea saga, it is ok but doesn't really make me in a hurry to read the rest, especially since I was expecting something more epic. Maybe the later books are better.
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I reread the first book of Xanth, I remember it as something really funny, but I was more surprised to see it was so sexist.