Urban II gave the Crusaders two goals, both of which would remain central to the eastern Crusades for centuries. The first was to rescue the Christians of the East. As his successor, Pope Innocent III, later wrote:How does a man love according to divine precept his neighbor as himself when, knowing that his Christian brothers in faith and in name are held by the perfidious Muslims in strict confinement and weighed down by the yoke of heaviest servitude, he does not devote himself to the task of freeing them? ...Is it by chance that you do not know that many thousands of Christians are bound in slavery and imprisoned by the Muslims, tortured with innumerable torments?
"Crusading," Professor Jonathan Riley-Smith has rightly argued, was understood as an "an act of love"—in this case, the love of one’s neighbor. The Crusade was seen as an errand of mercy to right a terrible wrong. As Pope Innocent III wrote to the Knights Templar, "You carry out in deeds the words of the Gospel, ‘Greater love than this hath no man, that he lay down his life for his friends.’"
The second goal was the liberation of Jerusalem and the other places made holy by the life of Christ. The word crusade is modern. Medieval Crusaders saw themselves as pilgrims, performing acts of righteousness on their way to the Holy Sepulcher. The Crusade indulgence they received was canonically related to the pilgrimage indulgence. This goal was frequently described in feudal terms. When calling the Fifth Crusade in 1215, Innocent III wrote:
Consider most dear sons, consider carefully that if any temporal king was thrown out of his domain and perhaps captured, would he not, when he was restored to his pristine liberty and the time had come for dispensing justice look on his vassals as unfaithful and traitors...unless they had committed not only their property but also their persons to the task of freeing him? ...And similarly will not Jesus Christ, the king of kings and lord of lords, whose servant you cannot deny being, who joined your soul to your body, who redeemed you with the Precious Blood...condemn you for the vice of ingratitude and the crime of infidelity if you neglect to help Him?
The reconquest of Jerusalem, therefore, was not colonialism but an act of restoration and an open declaration of one’s love of God. Medieval men knew, of course, that God had the power to restore Jerusalem Himself—indeed, He had the power to restore the whole world to His rule. Yet as St. Bernard of Clairvaux preached, His refusal to do so was a blessing to His people:
Again I say, consider the Almighty’s goodness and pay heed to His plans of mercy. He puts Himself under obligation to you, or rather feigns to do so, that He can help you to satisfy your obligations toward Himself.... I call blessed the generation that can seize an opportunity of such rich indulgence as this.
It is often assumed that the central goal of the Crusades was forced conversion of the Muslim world. Nothing could be further from the truth. From the perspective of medieval Christians, Muslims were the enemies of Christ and His Church. It was the Crusaders’ task to defeat and defend against them. That was all. Muslims who lived in Crusader-won territories were generally allowed to retain their property and livelihood, and always their religion. Indeed, throughout the history of the Crusader Kingdom of Jerusalem, Muslim inhabitants far outnumbered the Catholics. It was not until the 13th century that the Franciscans began conversion efforts among Muslims. But these were mostly unsuccessful and finally abandoned. In any case, such efforts were by peaceful persuasion, not the threat of violence.
The Crusades were wars, so it would be a mistake to characterize them as nothing but piety and good intentions. Like all warfare, the violence was brutal (although not as brutal as modern wars). There were mishaps, blunders, and crimes. These are usually well-remembered today. During the early days of the First Crusade in 1095, a ragtag band of Crusaders led by Count Emicho of Leiningen made its way down the Rhine, robbing and murdering all the Jews they could find. Without success, the local bishops attempted to stop the carnage. In the eyes of these warriors, the Jews, like the Muslims, were the enemies of Christ. Plundering and killing them, then, was no vice. Indeed, they believed it was a righteous deed, since the Jews’ money could be used to fund the Crusade to Jerusalem. But they were wrong, and the Church strongly condemned the anti-Jewish attacks.
Fifty years later, when the Second Crusade was gearing up, St. Bernard frequently preached that the Jews were not to be persecuted:
Ask anyone who knows the Sacred Scriptures what he finds foretold of the Jews in the Psalm. "Not for their destruction do I pray," it says. The Jews are for us the living words of Scripture, for they remind us always of what our Lord suffered.... Under Christian princes they endure a hard captivity, but "they only wait for the time of their deliverance."
Nevertheless, a fellow Cistercian monk named Radulf stirred up people against the Rhineland Jews, despite numerous letters from Bernard demanding that he stop. At last Bernard was forced to travel to Germany himself, where he caught up with Radulf, sent him back to his convent, and ended the massacres.
It is often said that the roots of the Holocaust can be seen in these medieval pogroms. That may be. But if so, those roots are far deeper and more widespread than the Crusades. Jews perished during the Crusades, but the purpose of the Crusades was not to kill Jews. Quite the contrary: Popes, bishops, and preachers made it clear that the Jews of Europe were to be left unmolested. In a modern war, we call tragic deaths like these "collateral damage." Even with smart technologies, the United States has killed far more innocents in our wars than the Crusaders ever could. But no one would seriously argue that the purpose of American wars is to kill women and children.
By any reckoning, the First Crusade was a long shot. There was no leader, no chain of command, no supply lines, no detailed strategy. It was simply thousands of warriors marching deep into enemy territory, committed to a common cause. Many of them died, either in battle or through disease or starvation. It was a rough campaign, one that seemed always on the brink of disaster. Yet it was miraculously successful. By 1098, the Crusaders had restored Nicaea and Antioch to Christian rule. In July 1099, they conquered Jerusalem and began to build a Christian state in Palestine. The joy in Europe was unbridled. It seemed that the tide of history, which had lifted the Muslims to such heights, was now turning.
Would you start a Victorian Dance Ensemble if you would never be able to go to a Victorian ball and dance? Would you start a Victorian Dance Ensemble if you knew that Victorian Dance was considered a "dancing abuse"? 
