Who began his own religion because he disagreed with the Catholic Church?

Answer 1

Martin Luther.

Roman Catholic AnswerThere have been a number of famous heretics who started their own religions because they disagree with the Catholic Church, starting with the Judaizers in the first century. In the fourth century, there was a priest in Alexandria, Arius who started the heresy which now bears his name: Arianism. Originally a schism and then a heresy of the fourth and fifth centuries a man named Felix of Aptunga became an apostaste and started Donatism. In the third century a Persian name Mani started Manichaeism, a heresy that stated that there were two Gods, one good, the other evil; these later developed into Albigensianism in Southern France in the 12th and 13th centuries. Mohammad started a heresy known as Islam, and centuries later, Luther, Calvin, et all started a similar heresy known as Protestantism.