Complex sentence: Above all, Huguenots became known for their harsh criticisms of doctrine and worship in the Catholic Church from which they had broken away, in particular the sacramental rituals of the Church and what they viewed as an obsession with death and the dead.
Split into simpler sentences: Above all, Huguenots became known for their harsh criticisms of doctrine and worship in the Catholic Church from which they had broken away. In particular they criticised the sacramental rituals of the Church and what they viewed as an obsession with death and the dead.