Dagon only hates imerials(the empire)? I would thin,being as ugly as he is,he would invade akavir,to avoid futere "resistance".
ummmm... ok.
:facepalm:
nevermind...
He doesn't necessarily hate imperials... he's the force of destruction personified. If he destroys the White-Gold tower of cyrodil, he'd have the destruction he needed. It, being the center tower, has power over all the other towers, and therefore all creation. The IC is built in the image of the Aurbis. So... it would be the same principle as a voodoo doll. Destroy the image in order to destroy what it represents. That's just a personal theory of mine.
I think perhaps it's a little too lore-heavy for this thread. Sorry.