No idea mate, most of medieval age can be called the dark ages because of the amount of violence, wars and deaths. Religion was a tool used to create the violence in a lot of these cases but I doubt it was the true motivation, please remember that a lot of the leaders of these religious movements contradicted their beliefs, for example the ottoman leaders had like 7 Christian women each and kids with them. I thought that goes against their religion....it's clear that all they wanted to do was have fun sleeping with sex slaves at other people's expense. Disgusting animals, actually no, I like animals, disgusting criminals.Do you know if this story is true? An Albanian bishop had condemned decapitating dead Turks on the grounds that that was cowardice and only alive Turkish soldiers should be decapitated.
Sounds like one of those stories, but you never know.