Why do you think Berlas of CE regards the Carelians as cowardly jackals? Given the above, and the apparent backstab that they gave the Empire, as well as the diplomatically near-impossible switch that Caergoth and Suville did (Hey we're at war with the snakes/hey, we're best of buddies), he has quite a lot to be unhappy about.
CE pretty much threatened all three of those realms with war and you're surprised they banded together against you?
