A few facts wouldn't go astray here:
The Expulsion
In 1492 Granada surrendered to Ferdinand and Isabella, the new Spanish Monarchs. One of the conditions of surrender was that the status and rights of the Jews should be respected but this agreement was broken and the Jews expelled. Not only that but in 1492 all of the Jews were expelled from Spain. Altogether possibly more than 200,000 Jews were exiled. About 100,000 of the exiled Spanish Jews then went to Portugal from which they were expelled in 1496-97 after their children had been taken away from them. The expulsion from Spain was accompanied by great hardship. Those who were expelled lost most of their possessions and many of them were later robbed, raped, and sold into slavery or murdered in the course of their enforced wanderings. Great names of Spanish Jewry included some of the greatest and most original thinkers that have ever existed. Some of them were veritable geniuses, and truly holy men. They included writers of religious and philosophical works whose written word is often the best possible expression of literacy known to the annals of humanity. A very small sampling of luminaries of Spanish Jewry include names such as Alfasi, Yehudah HaLevi, Iben Ezra, Maimonides, Solomon Iben Gabirol, Kimchi, Ibn Tibbon, Iben Gikatilla, Abudarham, Albo, Crescas, Nachmanides...
http://britam.org/spain.html
Please explain as to why the Spanish Monarchy chose to banish the Jews once it finally defeated and kicked out the muslims. Was it two for the price of one? Was it anti-Semitism? Were the Jews somehow perceived to be, or actually collaborating with the muslims and thought to be, in the end, equally at odds with Spain? I am not familiar with this aspect of the history of their expulsion.