In Spain under the Umayyads and in Baghdad under the Abbasid Khalifas, Christians and Jews, equally with Muslims, were admitted to the Schools and universities - not only that, but were boarded and lodged in hostels at the cost of the state. When the Moors were driven out of Spain, the Christian conquerors held a terrific persecution of the Jews. Those who were fortunate enough to escape fled, some of them to Morocco and many hundreds to the Turkish empire, where their descendants still live in separate communities, and still speak among themselves an antiquated form of Spanish. The Muslim empire was a refuge for all those who fled from persecution by the Inquisition.
The Western Christians, till the arrival of the Encyclopaedists in the eighteenth century, did not know and did not care to know, what the Muslim believed, nor did the Western Christian seek to know the views of Eastern Christians with regard to them. The Christian Church was already split in two, and in the end, it came to such a pass that the Eastern Christians, as Gibbon shows, preferred Muslim rule, which allowed them to practice their own form of religion and adhere to their peculiar dogmas, to the rule of fellow Christians who would have made them Roman Catholics or wiped them out.
The Western Christians called the Muslims pagans, paynims, even idolaters - there are plenty of books in which they are described as worshiping an idol called Mahomet or Mahound, and in the accounts of the conquest of Granada there are even descriptions of the monstrous idols which they were alleged to worship - whereas the Muslims knew what Christianity was, and in what respects it differed from Islam. If Europe had known as much of Islam, as Muslims knew of Christendom, in those days, those mad, adventurous, occasionally chivalrous and heroic, but utterly fanatical outbreak known as the Crusades could not have taken place, for they were based on a complete misapprehension. I quote a learned French author:
“Every poet in Christendom considered a Mohammedan to be an infidel, and an idolater, and his gods to be three; mentioned in order, they were: Mahomet or Mahound or Mohammad, Opolane and the third Termogond. It was said that when in Spain the Christians overpowered the Mohammadans and drove them as far as the gates of the city of Saragossa, the Mohammadans went back and broke their idols.
“A Christian poet of the period says that Opolane the “god” of the Mohammadans, which was kept there in a den was awfully belaboured and abused by the Mohammadans, who, binding it hand and foot, crucified it on a pillar, trampled it under their feet and broke it to pieces by beating it with sticks; that their second god Mahound they threw in a pit and caused to be torn to pieces by pigs and dogs, and that never were gods so ignominiously treated; but that afterwards the Mohammadans repented of their sins, and once more reinstated their gods for the accustomed worship, and that when the Emperor Charles entered the city of Saragossa he had every mosque in the city searched and had "Muhammad" and all their Gods broken with iron hammers.”
That was the kind of "history" on which the populace in Western Europe used to be fed. Those were the ideas which inspired the rank and file of the crusader in their attacks on the most civilized peoples of those days. Christendom regarded the outside world as damned eternally, and Islam did not. There were good and tender-hearted men in Christendom who thought it sad that any people should be damned eternally, and wished to save them by the only way they knew - conversion to the Christian faith.
It was not until the Western nations broke away from their religious law that they became more tolerant; and it was only when the Muslims fell away from their religious law that they declined in tolerance and other evidences of the highest culture. Therefore the difference evident in that anecdote is not of manners only but of religion. Of old, tolerance had existed here and there in the world, among enlightened individuals; but those individuals had always been against the prevalent religion. Tolerance was regarded of un-religious, if not irreligious. Before the coming of Islam it had never been preached as an essential part of religion.