The hatred is perhaps born of the fact that they hate the Empire and went to war with them, thus putting them in the state that they're in, so I hate them. That and the fact that they're completely anti-Man, so even if they had no history with the Empire whatsoever, I'd dislike them still.
Also, Tullius hints that there may be a Second Great War, and Thalmor documents label the first war as "The First Great War", implying that there will be one or more other wars, so I hope for the chance to play a role in this next war and take them down.
I was just wondering if anyone was in the same position that I'm in.