Luther initiated nothing of the sort. Idiots simply used Luther's teaching as their excuse to kill others. None of Luther's teachings can be interpreted as initiating an age of war. Following this idiotic reasoning, Jesus was responsible for the Crusades and the inquisition while Moses cause the Holocaust.
By the same reasoning an unreasonable Pope, that forced Luther to nail his thesis to the door of the Church by selling indulgences and ignoring the teachings of Jesus, initiated the war even more than Luther did.
I add that since the Pope was infinitely more powerful than Luther, he must be thousands of time more responsible for the ensuing conflicts.