Complex sentence: Unfortunately, his depiction of Incan religion and gradual expansion is nurtured by his Christianized view of the indigenous past; as an example, no mention is made of human sacrifices in Inca times.
Split into simpler sentences: Unfortunately, his depiction of Incan religion and gradual expansion is nurtured by his Christianized view of the indigenous past. As an example, no mention is made of human sacrifices in Inca times.