When Secular Humanism replaced Scholasticism as the popular philosophy of the time there became an increasing desire to follow one's own desires and lusts free from the restraints of the teaching of Jesus and the disciples through the Church. This was aided by the lust of power by the European princes that was usurped by the Church. An alliance formed for these complimentary goals between the Secular Humanists and the princes to usurp the Church's influence on society.
The reformers, Luther, Zwingli, Calvin and et al. labored to form a pseudo-christian faith that focused on God serving man instead of the teaching of Jesus and the disciples through the Church which taught that it is man that serves God instead. The reformers strive for a syncretic blending of Secular Humanism and Christianity and the princes were more than happy to support their efforts out of greed. While this greed motivated the political powers it was pride and arrogance that motivated the reformers and made them feel that they could construct a alternative faith to the faith founded by Jesus and the disciples to one founded upon their own desires and in many cases their own lust for power which was the case with Calvin and his theocracy in Geneva. Instead of Christianity being an obstacle for their ambitions they twisted its teaching to be an asset and a means to their goals.
From the more spiritual aspect of this movement it was a very clever approach from the enemy of the truth of the Christian faith which is Satan who certainly is the author of the confusion that was born of the Reformation or the rebellion from the Church. Because the cry of the Protestants now was for God to serve humanity because God owes humanity devotion. This is contrary to the cry of the faithful for the previous 1500 years of "let thy will be done and not thine".
The fruit of the Protestant movement is over 30,000 different ecclesiastical groups each claiming their own version of truth and each possessed by their own heresy which grows at a exponentially increasing rate. Protestantism is a diluting and obscuring of the truth contained in the teaching of the Church with a focus on man and his desires instead of man serving the will of God. In Protestantism man does not have to humble themselves before their creator but instead take pride in their own creation which usurps the work of Christ. May the Lord have mercy on them. God bless!