Without teachers to teach them about the matter, simple people have become victims of the fallacy, purposefully spread by socialists, that we should judge events, decisions and actions that happened in distant historical periods by applying present day moral values universally. As if people in the late Middle Ages saw the world in the same categories in which we see it, or they thought about the State, God, their purpose in life in the same way in which a post-modern man thinks. If you have ever read a history schoolbook written from a Marxist perspective in the times of a Communist dictatorship, the similarities in the reasoning will hit you hard. Basically, the peasants revolted against the feudal lords because of class struggle, therefore their actions were progressive (because they were moving the wheel closer to the advent of Capitalism and its natural successor - the revolution of the proletariat) and just :D