Persecution of Muslims
The Philippines is predominantly a Christian society with a complicated history of relations between Islam and Christianity. Despite historic evidence of Islamization spreading throughout the islands in the 13th–16th centuries, the archipelago came under Spanish rule in the 16th century. The Spanish proselytized many natives, and labelled those who remained Muslims as "Moro", a derogatory term recalling the Moors, an Islamic people of North Africa who occupied parts of Spain for several centuries. Today, this term "Moro" is used to refer to the indigenous Muslim tribes and ethnic groups of the country. When the Spanish came to the Philippine islands, most of the natives in Luzon and Visayas were pagans with Muslim minorities, and while Spanish proselytized many natives, many Muslims in Luzon and Visayas were not exempted by the Spaniards from the Spanish Inquisition, wherein Muslims to become Catholics or die for their faith. Those who remained Muslims are only the natives of Mindanao and Sulu which the Spaniards did not invade or had control of only briefly and partially.
Mindoro
The island was briefly invaded by the Sultanate of Brunei and housed Moro settlements before the Spanish invaded and Christianized the population. Afterwards, the area was depopulated due to wars between the Spaniards and the Moros from Mindanao who sought to enslave the hispanized people and to re-islamize the island. Consequently, most of the population fled to nearby Batangas and the once rich towns of Mindoro fell to ruin. In the seventeenth century, Giovanni Francesco Gemelli Careri visited the island.
In 1898, Mindoro joined in the Philippine Revolution against Spain due to the influx of rebels settling into the island from Cavite and Bataan. Local patriotism died down however during the American occupation of the Philippines and the Japanese era.