What was the main thesis of M. Luther, from which the whole program of church reform proceeded?

Martin Luther’s main idea was that the church should not be a mediator between man and God. He wrote 95 theses against indulgences and other church rites. According to Lutherans, religion is an individual matter for everyone. They recognized only the rite of baptism and some simplified and cheaper traditions. The main thing was not the pompousness of church rituals, services, etc. The Protestants supported Martin Luther. With his teachings, the reformation began in Germany, which embraced not only the peasants, but also the feudal lords.