Complex sentence: Many Goans living under colonial rule resented the presence of the Portuguese colonialists for their brutal policies and mandates, and their relentless campaigns to convert the predominantly Hindu Goans to Christianity.
Split into simpler sentences: Many Goans living under colonial rule resented the Portuguese presence. The Goans resented the Portuguese colonialists for their brutal policies and mandates and their relentless campaigns to convert the predominantly Hindu Goans to Christianity.