This is part of distancing our enlightened modern free civilization from the horrors on which it is built. It wasn’t “us’ who did all those things. It was some crazy barbarians that look a little like “us”. If truly pushed then we turn on poor rural “white trash” and blame THEM for it.
Nononono: The conquests, genocides, persecutions, holocausts, slaving, colonialism, etc, etc, were primarily funded and run by elites for their own benefit.