How important was religious zeal during the Crusades??
it was very important. it was the whole reason for the crusades. the christens thought they were better than everyone else and thought Jerusalem was theirs. the crusades resulted from that religious tension. look at http://en.wikipedia.org/wiki/Crusades The Crusades were a series of military conflicts of a religious character waged by much of Christian Europe against external and internal threats. Crusades were fought against Muslims, pagan Slavs, Russian and Greek Orthodox Christians, Mongols, Cathars, Hussites, and political enemies of the popes.[1] Crusaders took vows and were granted an indulgence for past sins.