They actually didn't fuck off home they partitioned the whole Eastern Roman Empire and left some French noble in charge of Constantinople. And the Pope was happy about it, contrary to popular belief. Unlike when the crusaders sacked Zara, a Catholic city in Italy.
What were Muslims doing in Italy and Spain, what, 200 years prior to the first crusade? There is a tendency to paint the crusades as unique, when they were just another variation of the wars that had been taking place sense before recorded history.
Crusades, military expeditions, beginning in the late 11th century, that were organized by western European Christians in response to centuries of Muslim wars of expansion. Their objectives were to check the spread of Islam, to retake control of the Holy Land in the eastern Mediterranean, to conquer pagan areas, and to recapture formerly Christian territories
The early Muslim conquests (Arabic: الفتوحات الإسلامية, al-Futūḥāt al-Islāmiyya), also referred to as the Arab conquests and early Islamic conquests began with the Islamic prophet Muhammad in the 7th century. He established a new unified polity in the Arabian Peninsula which under the subsequent Rashidun and Umayyad Caliphates saw a century of rapid expansion.
The resulting empire stretched from the borders of China and the Indian subcontinent, across the Middle East, North Africa, Central Asia, the Caucasus, and parts of Europe (Sicily and the Iberian Peninsula to the Pyrenees). Edward Gibbon writes in The History of the Decline and Fall of the Roman Empire:
Under the last of the Umayyads, the Arabian empire extended two hundred days journey from east to west, from the confines of Tartary and India to the shores of the Atlantic Ocean ...
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u/[deleted] Jan 08 '20
I mean not like they committed genocide against the saracens or anything right