I've read some of what he's written on his blog, and I am more than satisfied that he's a racist, sexist, homophobic dipshit who completely deserves all the opprobrium he receives. What's worse, he's one of those crazy religious fanatics who twists the bible into excuses to hate people, like the Westborough folks. As a human, I find him utterly contemptible.
Nevertheless, if I'd been voting on the Hugos this year, I would have judged his work on its own merit. I still find Orson Scott Card an outstanding writer, despite my (milder) contempt for the man himself. Fortunately, I have many friends who were Hugo voters this year, who are also capable of separating their opinion of the artist from their opinion of the art, and they have uniformly told me that the work didn't deserve a nomination, let alone a win. Maybe it wasn't bad enough to end up below no-award--maybe that happened because of Day's vile on-line persona--but the fact that it didn't win seems to me to be fully justified.