From what I read, the provinces of Nueva Ecija, Tarlac, Isabela and Nueva Vizcaya were pagan before 18th century and because of resettlement and the genocide(via violent means and forced assimilation) they were able to christianize them, it was because the Christian tribes were cooperative with the Spanish, what if the Spanish attempt to destroy the pagans in those provinces fails.
How would a more Pagan Philippines look like?