Ugly Parts of History
There are many aspects of the High Middle Ages that are really quite nice. But there are some ugly parts, too. The Inquisition. The blood libel. And worst of all--the blood libel is still being passed around by Muslims who must (or should) know better. At least well educated Europeans recognized it for garbage at the time, such as the commission Holy Roman Emperor Frederick II organized to look into the claim, and Pope Innocent IV.