Converted them just in time for the Spanish Inquisition.
Ah yes, after centuries of suffering under Islamic conquest and oppression that great institution called the 'Spanish Inquisition' was designed by the King and Queen of Spain to expose and rid themselves of the leftover Muslims, (and their allies), who had falsely converted and remained in Spain as subversives and spies. It also exposed many Jews who had fought alongside the Moslems in North Africa to help defeat the Spaniards. Spain suffered what modern day Europe is now suffering, they were infested with deadly muslims, but they knew how to deal with it. I regret that Europe and the U.S. don't have the brains and guts that the King and Queen of Spain had.