What is your source for this?
My source? Numerous articles and books over the course of a lifetime's reading. But one useful book on the background of the Reconquista is Warren H. Carroll, "Isabel of Spain." And on the rather large subject of the sometimes unfair vilification of Catholic Spain by British and Dutch propagandists, see Madden's book, "The Black Legend." We still think of the Spanish Inquisition as one of the very worst things in the history of the world. Just say the words "Spanish Inquisition" and even people who have never opened a history book will give a jerk of displeasure. Much the same as with the word "Apartheid." Just the word itself will do it, you don't need to get into details. Well, the Spanish Inquisition (which was administratively separate from the Roman Inquisition) was certainly abusive, but so were numerous other historical events that have been largely forgotten because the propagandists didn't succeed in painting such a brilliant but distorted picture of them.
As I said, I am by no means trying to say that the Spanish were all virtuous or all the Jews deserving of being expelled. During the Reconquista there were many Spanish traitors, too, and numerous nearly fatal setbacks. There were heroes like El Cid, virtuous kings like Alfonso el Sabio, and plenty of villains to go around.
As an aside, my great, great grandfather was expelled from the Austro-Hungarian Empire in 1848 and fled to London, where that branch of my family lived before one of his grandsons came to America and married my grandmother. He was an associate of Lajos Kossuth in the failed Revolution of 1848. I don't repudiate him for that, but neither do I blame the Emperor for expelling him.