I've noticed this for some time. Leftists impose a distorted view of Western history, that - er - "whitewashes" the evil that non-White people did to the White people they conquered.
Leftists will insist that Andalusian Spain was a Heaven on Earth - filled with Islamic scholarship, equality between all religions, and a Paradise for women.
Don't believe it. The Muslims imposed their rule by force, and did NOT treat the Christians kindly. Read the full Front Page Magazine story, and pass it on.