This is so sad, not knowing world history. Spain was not one united country until the marriage of King Ferdinand and Queen Isabella. At that time there were vast population areas of both Jews and Muslims.
Jews had gone to and been in Spain for centuries, probably longer, some think since the days of King Solomon for trading, but since Spain was historically both a trade and military area for the Roman Empire, Jews from both Rome and the Middle East went to Spain.
After the birth of Islam in the 7th century C.E. traders from newly Islamicized lands (conversion by the sword as by ISSIS today) went to Spain...there was an actual Golden Age of learning in Southern Spain where Jews, Muslims and Christians lived in harmony and studied and shared theories and knowledge with one another. The area is Granada, Cordaba , Southern Spain.The rest of Europe was in a dark, dark age, where learning had ceased, all but for a few. Holy writ (Bibles) were not permitted among the common folk. Jews did not have that prohibition nor did Muslims although that was a new religion (given by an "angel" not unlike Mormonism...interesting that Paul the Apostle warned the early Christians of new teaching coming from angels!)
In 1492 Ferdinand and Isabella expelled the Jews and the Inquisition began in earnest. Among the crews of the Nina, Pinta and the Santa Maria, his three ships, were many "conversos" those who, by blood and lineage were Jews or Arabs ("Moors") but, who for political reasons or simply to stay alive, had converted to Catholicism. They came to the new world, the Americas, and over the subsequent years more of these "Spaniards" , hundreds and hundreds of them, and later women and children also, came to find their fortunes and to escape the Inquisition...which amazingly followed some of them to the new world! Inquisitors went to Peru and Mexico!
The reason so many Mexicans look "Middle Eastern" is because they often have that in their lineage...they sometimes don't even recognize that they have Arabic or Jewish (Hebrew) names!
A good example is the name "Omar"... and if you hear the name "David" in Spanish it sounds like the Hebrew pronunciation. There is a lot of Middle Eastern (Jews were originally Middle Eastern) blood in Spain , even today ,though Northern Spain was home to an ancient celtic people.