Doormattery doesn’t really work unless you have an enemy that can be shamed at the sight of carnage. Such instances in history are limited.
Early pacifistic Christianity was moderately workable in the context of the Roman Empire. Despite the "Christians to the lions" stories, if you paid your taxes and didn't try to openly undermine Roman authority, you could live your life in peace and relative security.
When Rome fell, you needed a class of people who could rationalize being Christian with the necessity to respond with extreme violence towards raiders, pirate, and barbarian invaders. These people became the feudal nobility, ruling over the rest who lived as serfs.