Peter the hermit begin the children's crusade was the leader during the first crusade captured Jerusalem

Explanation:

Before Peter went on his crusade he received permission from Patriarch Simeon II of Jerusalem. Peter was able to recruit from England, Lorraine, France, and Flanders. Peter the Hermit arrived in Cologne, Germany, on Holy Saturday, the 12th of April in 1096. In the spring of 1096 Peter was one of the prominent crusader leaders involved in the Rhineland massacresagainst the Jews. Peter and his followers participated in the torture and slaughter of Jews in Lorraine, Cologne, and Mainz

martin luther believed that selling indulgences was wrong and gave people a license to sin. the roman catholic church used the practice of indulgences to raise money for major building projects.