Excuse me. The Catholic church EX-COMMUNICATED him.
Well when you try to change the Bible to fit what you want it to say, it’s time to be EX-COMMUNICATED.
Notice a change he admitted to regarding Romans 3:28:
“You tell me what a great fuss the Papists are making because the word alone in not in the text of Paul…say right out to him: ‘Dr. Martin Luther will have it so,’…I will have it so, and I order it to be so, and my will is reason enough. I know very well that the word ‘alone’ is not in the Latin or the Greek text” (Stoddard J. Rebuilding a Lost Faith. 1922, pp. 101-102; see also Luther M. Amic. Discussion, 1, 127).
Luther was excommunicated for several reasons but mostly for refusing to adhere to his vows of fidelity and obedience.
His rejection of the misuse of indulgences was forthright and reading his theses one can see that in the beginning he tried to call attention to those misuses and yet remained faithful to much of Catholic doctrine and theology.
Using indulgences to raise funds for a lavish lifestyle for the clergy was wrong. Using indulgences as an excuse to sin with impunity was wrong.
Luther had the chance to remain in the Church and work within her to return the faithful to right practices but he did not do that.
Finally, he denied and scorned the authority of the pope and the Church councils but then assumed that authority for himself as he established his own idea of church with creeds and a catechism and a clergy.
He was a tortured soul who never found peace even in his own religion.
The Church was right to formally excommunicate Luther.