You haven't seen what people in realms CE has destroyed say about CE—or what CE, in turn, says about them? People have tribe mentalities.
We assume of others what we know to be true of ourselves.
Are you sure you're not just projecting?
I have not seen any CE players OOCly trash-talking about players from the northern realms or Carelia. I did rant about the anti-CE propaganda that was smeared all over the forums, and was assured by people that they bore no actual OOC hatred for an entity that, err, only exists in a game, that they were just teasing. Which makes sense. I feel rather silly about ranting now. (
http://forum.battlemaster.org/index.php/topic,1945.0.html)
I'm not exactly drowning in hate mail either.
I would like to think that the vast majority of players still think of this game as "board game night at Tom's place."