The court of the Inquisition. And it generally persecuted Conversos, not Jews who remained Jewish.
Inquisition
It threw them out in 1492. The Catholics had pushed the last Muslims out of Spain in January 1492. They then gave the Jews until the end of July to leave Spain.
The Catholic Church in Spain, and the Spanish Inquisition, either killed, expelled or forced the Jews and Muslims in Spain to convert.
Muslims
The Spanish Inquisition, founded in 1478. Initially, its sole function was to sniff out 'insincere converts' from Judaism. Later this was extended to Muslims and later to anyone who defied the authority of the Church. In Spain, Jews and Muslims had been put under enormous pressure since about 1350 to convert to Christianity.
The Muslims had been pushed out of Spain by 1498 for several reasons. For one, the Roman Catholic church felt the Muslims had too much power on the Iberian Peninsula. Furthermore, the Moors were shaping Spain in the image of a greater Arabia. In fact, there were several Mosques and Islamic architecture that replaced traditional Spanish buildings and residential establishments. Due to the dominance of the Muslims Moors, the Spanish united in an effort to oust them from their soil.
Yes, Muslims in Spain account currently for less than 91% of total population. Even during Muslim control of Spain, Muslims were minority and they never obliged the Spanish to convert to Islam.
No, Muslims did not adopt the local religion and customs when they settled in Spain.
The Reconquista. Jews and Muslims alike were driven out of Spain. The Reconquista ended in 1492 when Moorish Granada surrendered. The Muslims were allowed to remain in Spain. The Jews and the Muslims were expelled later.
The Religion was dominant in Southern Spain from 711 until 1492, under the rule of the Arabs and Moors of al-Andalus.
Muslims in Spain used to be called MOORS, although in modern times, the term is considered somewhat derogatory. The current term for them is Berbers or Amazigh.
Islam was first introduced to Spain in 711 A .D.