A multi-ethnic, multi-religious culture built Spain into an intellectual powerhouse so much so that after the reconquesta scholars from various parts of Europe flocked there to translate the scientific and philosophical works from classical Arabic into Latin triggering the European renaissance.
But soon there were other changes. The Holy Office of the Inquisition was born. Muslim dress, Arab names and the Arabic language were outlawed. A new inferior class of people emerged - Moriscos. They were Muslims who had converted to Catholicism under threat, usually of exile and loss of property. Many of course continued to practice Islam in secret.
Discrimination and mistreatment led to Morisco rebellions which were crushed. Eventually they were forced into internal exile to the northern provinces of Extremadura, La Mancha and New Castile where there was greater tolerance particularly in La Mancha.
In Toledo, the area around the cathedral gained fame as an informal school of translators. Often Morisco, these translators' services were available to scholars or others requiring translation of Arabic texts. It is here that the narrator of Cervantes' epic Don Quixote of La Mancha finds a translator for an Arabic manuscript, a supposedly historical account of Don Quixote's adventures. The author of the fictional text is Cide Hamete Benengeli, a name that is clearly of a Morisco. If Spain was busy making Moriscos a non-people, Cervantes was reminding them of their heritage.
In 1492 when the last Arab Emirate (Grenada) was relinquished to Catholic Spain the treaty signed promised Muslims the right to their way of life in perpetuity. Their Catholic Majesties Ferdinand II and Isabella I soon reneged on the deal. Restrictions, internal exile, discrimination and forced conversions were the result. But even the converted were not safe. As Ottoman power expanded to the Mediterranean, Spain felt threatened. Morisco loyalty became suspect and in the early 17th century they were expelled from Spain as were the Jews. So ended 900 years of coexistence, fruitful and friendly that changed to suspicions and final expulsion under Catholic Spain.
And what of Spain? Having lost its intellectual dynamism, it took its brand of intolerant Christianity to the Americas and added it to European diseases to which the people there had no immunity. A devastated but Christianized population was the result. Time and immigration have changed demographics. A majority of Argentines for example have Italian ancestry; German influence in Chile which encouraged immigration from there in the 19th century is another example.
Our own Ferdinand and Isabella composite resides in the White House with a good chance he will not next year. Life will go on and people will continue to practice the religion of their birth or choice.