Which religious motive helped unite European Christians in fighting the First Crusade?

raising funds for building a new basilica in Rome

taking Jerusalem from the control of Islamic rulers

allowing missionaries to introduce Christianity to China

destroying Constantinople as punishment to the Byzantine emperor

1 answer

The religious motive that helped unite European Christians in fighting the First Crusade was taking Jerusalem from the control of Islamic rulers. The Crusades were motivated by a desire to reclaim the holy city of Jerusalem and other sites considered sacred by Christians, which were under Islamic control at the time. This aim was a significant factor in rallying support across various European Christian communities for the Crusade.