I'm sorry, but the historical details I mentioned are true. I'm not saying that the Jews deserved to get kicked out of Spain. I'm saying that they got caught in the middle of a war to the death between the Spanish and the Moors.
It was by no means evident at the time which side would win that war. Constantinople fell in 1453, the Siege of Vienna was in 1529, when it looked as if all of Europe might be lost to the Turks, the Battle of Lepanto was in 1571, and it was not until then or even later that Christian Europe won naval superiority in the Mediterranean. Perhaps the Spanish were entirely wrong to expel the Jews, but that was their basic reason.
What is your source for this?