A large part of the argument between the two lies in historical grievances, which are messy, complicated and unpleasant for an outsider:
From the safe standpoint of Washington or London, it's easy to dismiss this historical discussion as retrograde, paranoid, even a drag on economic development. And it's true that discussing history with the Russians probably hasn't been good for Russian-Estonian trade. Nor has debating what happened in Katyn fixed Poland's crumbling roads. One Estonian politician told me that a German colleague had instructed him to forget about history and move on, saying that "you're wasting your time."