For instance, the Civ games are basically Whig History: The Game, presenting liberal capitalism as the ideal end point for all societies. It even includes uncivilized "barbarian tribes" whose sole purpose is to be exterminated so you can take their land for the glory of capitalism.
Someone else once said that a decent way to handle it might be to have a "concentration camp liberated" event that fires when you take certain provinces while fighting Germany and I think there's some merit to that