The actual history shows the Europeans were constantly being invaded by foreign conquerors (Mongols, Moors, Turks) and killed by the millions by diseases coming from foreign countries.
Meanwhile, while subjugating certain foreign populations, Europeans also brought technology, science, and modern medical practices to many backwards places.
Moral of the story: never trust a leftist to tell the truth about anything. The best they can do is a half truth.
Left and right do this, but differently.
See tragedy.
Blame tragedy on other guy.
Hardly lift a finger to help tragedy (it seems to be enough to say “Other Guy should have known better”).