Revan isn't insane. However is he deemed that the Emperor is so dangerous that he needs to unleash a massive biological weapon that kills every living organic that has sith ancestry within their blood. Which is pretty much the entire empire, excluding impure races like their slaves of course.
Ya.... my thread. People are so ignorant it makes me facepalm for our future as a society.
It is the fact that I haven't closely followed the development, story, or books associated with the universe. Granted, that is a personal choice, but I wanted to approach a story driven MMO and maintain a degree of surprise. I had really ruined a lot of what happened in WotLK for myself be gathering far to much information prior to release.
Also, I'm not a child so you don't have to worry about the future of our society. I'm already well on my way to destroying it as it is now.