Who where the largest supporters of the crusades?

The largest supporters of the Crusades were primarily the Roman Catholic Church and its leaders, including Pope Urban II, who called for the First Crusade in 1095. Nobles and knights from various European regions, particularly France, England, and the Holy Roman Empire, also played a crucial role by mobilizing armies and resources. Additionally, the promise of spiritual rewards, such as indulgences and the opportunity to reclaim the Holy Land, motivated many common people to join the cause.