Then he was wrong too. The Reformation was just the beginning of the turn back to scripture and the true teachings of Christ and the Apostles, not the end. Wherever error is found it must be exposed to the Light.
However, Lutherans STILL adhere to Marian beliefs that are remarkably similar to Catholicism's.
He established His Church and said He would remain with it for all time and that the gates of Hell would not prevail upon it; He sent the Holy Spirit upon it to teach it all truth; He told Saul that Saul was persecuting HIM:...Scripture calls the Church the Pillar and Ground of Truth and Jesus says He who hears you hears me..and, it turns out, all of that was a pack of lies.
Apparently,He failed. His word went forth and returned void.
Worse, it didn't return void, did it?
For if you're correct, His Church mislead billions of Christians and they all went to Hell until the 16th century.
But, then that would make Jesus Satan.
I forget in Scripture where Jesus establishes His Church and teaches it will lie and lead Christians into Hell until more than Fifteen Centuries after His Resurrection when a violent, vow-breaking, Jew-hating, drunk will be raised up...
In any event, it is an interesting thesis