The Medieval Christian threat never existed.
The Medieval Christian threat was in answer to the Medieval Islamic threat.
Although, Christians did do a lot to themselves as well. Primarily Protestant and Catholic fighting about dogma and doctrine and such.
The devil, as they say, is in the details. And in the fight over the details, the devil got a good laugh.
But thankfully, Christians grew up, as Bobby says.
The murderous minions of MadMo (piss be upon his head) not so much.