I quite agree with your thinking, except some will insist on trying to present history as some glorified, divine, mutually beneficial, benevolent actions of an empire. Empires are simply not created like that. They are created by the domination, and asset-stripping of weaker countries by stronger ones. And in the process atrocities are invariably committed. You can't separate the one aspect from the other.
It's only when some want to glorify the deeds of a country, and deny, ignore, excuse or disregard the atrocities, some of which happened in the very recent history, that needs addressing.
By the same token, when some try to suggest, and their perceived history adds to that illusion, that others (in the past, or currently) are guilty of such atrocities or misdemeanours, while their country is not only innocent, but claims to be a saviour of the world, history needs to be presented in reality, instead of the glossed-over version that they perceive.
I repeat, if we deny or ignore history, or pretend it didn't happen, we're doomed to make the same mistakes.