Complex sentence: Peruvians, including many of mainly indigenous descent, regard him negatively, although until relatively recently Pizarro was portrayed positively, for instance in textbooks, for imposing Catholicism and creating a privileged class of mainly Spanish descent.
Split into simpler sentences: Peruvians, including many of mainly indigenous descent, regard him negatively. Until relatively recently, Pizarro was portrayed positively, for instance in textbooks, for imposing Catholicism and creating a privileged class of mainly Spanish descent.