Do not simplify the world through a single lens. The conquest of Inca by Pizzaro is a far more colorful story. I thought the Chinese knew better how to write a piece of history :-)
If you DO want to pronounce your moral values, do it through analytical layout of events, not the other way around.

E.g., the kill of Atahualpa was, as I understand, a more political move to stablize the colony. You are not on the point.