[RalphyS]

I actually looked it up on wikipedia.org and the city of Jerusalem was under Arab/Islam rule from 638 CE to 1099 CE, when the first crusade conquered it.

It was never in Roman Catholic hands before that, so it seems the crusaders were the offensive force, they were apparently provoked to do so by stories of churches being destroyed in the city.

In the first centuries CE Jerusalem was a relatively small and unimportant Roman town.

Quote:

The Byzantine Emperor Constantine, however, rebuilt Jerusalem as a Christian center of worship, building the Church of the Holy Sepulcher in 335. Jews were still banned from the city, except during a brief period of Persian rule from 614-629.

The city was one of the Arab Caliphate's first conquests in 638 CE; according to Arab historians of the time, the Caliph Umar ibn al-Khattab personally went to the city to receive its submission, cleaning out and praying at the Temple Mount in the process. Sixty years later, the Dome of the Rock was built, a structure in which there lies the stone where Muhammad is said to have tethered his mount Buraq during the Isra. This is also reputed to be the place where Abraham went to sacrifice his son (Isaac in the Jewish tradition, Ishmael in the Muslim one.) Note that the octagonal and gold-sheeted Dome is not the same thing as the Al-Aqsa Mosque beside it, which was built more than three centuries later. Umar ibn al-Khattab also allowed the Jews entry into the city and full freedom to live and worship after 400 hundred years. Jews were allowed to move back into their homes.

Under the early centuries of Muslim rule, especially during the Umayyad (650-750) and Abbasid (750-969) dynasties, the city prospered; the geographers Ibn Hawqal and al-Istakhri (10th century) describe it as "the most fertile province of Palestine", while its native son the geographer al-Muqaddasi (born 946) devoted many pages to its praises in his most famous work, The Best Divisions in the Knowledge of the Climes.

The early Arab period was also one of religious tolerance. However, in the early 11th century, the Egyptian Fatimid Caliph Al-Hakim bi-Amr Allah ordered the destruction of all churches and synagogues in Jerusalem, a policy reversed by his successors. Reports of this were one cause of the First Crusade, which marched off from Europe to the area, and, on July 15, 1099, Christian soldiers took Jerusalem after a difficult one month siege. They then proceeded to slaughter most of the city's Muslim and Jewish inhabitants. Raymond d'Aguiliers, chaplain to Raymond de Saint-Gilles, Count of Toulouse, wrote:

"Piles of heads, hands, and feet were to be seen in the streets of the city. It was necessary to pick one's way over the bodies of men and horses. But these were small matters compared to what happened at the Temple of Solomon, a place where religious ceremonies were ordinarily chanted. What happened there? If I tell the truth, it will exceed your powers of belief. So let it suffice to say this much, at least, that in the Temple and porch of Solomon, men rode in blood up to their knees and bridle-reins. Indeed, it was a just and splendid judgment of God that this place should be filled with the blood of unbelievers, since it had suffered so long from their blasphemies. The city was filled with corpses and blood. (Edward Peters, The First Crusade: The chronicle of Fulcher of Chartres and other source materials, p. 214)"

Jerusalem became the capital of the Kingdom of Jerusalem, a feudal state, of which the King of Jerusalem was the chief. Christian settlers from the West set about rebuilding the principal shrines associated with the life of Christ. The Church of the Holy Sepulchre was ambitiously rebuilt as a great Romanesque church, and Muslim shrines on the Temple Mount (the Dome of the Rock and the al-Aqsa Mosque) were converted for Christian purposes. It is during this period of Frankish occupation that the Military Orders of the Knights of Saint John and the Knights Templar have their beginnings. Both grew out of the need to protect and care for the great influx of pilgrims travelling to Jerusalem in the twelfth century. The Kingdom of Jerusalem lasted until 1291; however, Jerusalem itself was recaptured by Saladin in 1187, who permitted worship of all religions (see Siege of Jerusalem (1187).

Comparing the conquest of Jerusalem in 1099 with a defensive war because the Christians took it back would therefore be the same as describing an English invasion of the USA now as defensive for taking back its colonies.

And the quoted part in the text describes the atrocities of the crusaders quite accurately, it wasn't even written by the side that the atrocities where commited upon.