He is autistic. In case anyone missed it he posted a video response on youtubeCarnagath said:He looked autistic to me, and it pissed me off that people made fun of him, that's just not cool. Awesome for him, it's always fun to read up on fantasy lore/worlds that you like. I was pretty sure Blizzard would do this, it's not the first time they do something similar.
http://www.youtube.com/watch?v=OAuC1cXysho&feature=watch_response