Luther never set out to split from the Church but while many, including the Pope and Erasmus, sympathized with and sided with his call against corruption, the errors of Luther were confronted and refuted several times.
Luther reacted with arrogance and pride, and took his buddies with him.
Later on, when the Anabaptists (denying sola fide and infant baptism) broke away from the Lutherans due to their own personal interpretations that disagreed with those of Luther, Luther’s only recourse was to appeal for help from the secular powers.
Luther couldn’t appeal to Scripture, nor assert his “authority” over the Anabaptists – those people used Luther’s own weapons against him, the Bible (the Catholic book itself).
I wouldn’t be proud to be a Lutheran. Luther threw out books of the OT, would have thrown out James, Hebrews and Revelation… and yet he believed in Sola Scriptura, all the while wanting to reduce the size of Scripture to reject anything that didn’t agree with his personal interpretation.
Let’s not forget Luther’s anti-Semitism was the root of the Holocaust:
awitness.org/books/luther/on_jews_and_their_lies_p2.html
By their fruits you shall know them… God did NOT prompt Luther to rebellion. Compare the lives of Francis of Assisi, who responded to rebuild the Church, Teresa of Avila, John of the Cross, François de Sales… and then look at Luther, Calvin, Zwigli… please, while there had been plenty of corrupt men in the ranks of the Catholic clergy, the amount of true saints is overwhelming. Not one of the Protestant deformers could hold a candle to them. Least of whom Martin Luther.