For I am not ashamed of the gospel, for it is the power of God for salvation to everyone who believes, to the Jew first and also to the Greek. For in it the righteousness of God is revealed from faith for faith, as it is written, “The righteous shall live by faith.” Romans 1:16–17, ESV
The Protestant Reformation was used by God to restore the lost doctrine of Justification by Faith. Also, all of the reformers were adamant that the Bible be available to all people in a language they could read and understand. The Roman Catholic Church of that era was apostate and taught a corrupt gospel based on works. The Bible was kept locked up and away from non-scholars. It was always read verbally to the people in Latin, which few understood. As the Bible was translated from Hebrew, Aramaic, and Greek into German, English, French, etc. the doctrine of Justification by Faith became central. Why would our enemy and his seed seek to bury this doctrine within religion?