Original sentence: The Greek Cypriot official discourse follows an approach to the events of Bloody Christmas that "parallels denialist strategies", and is still reflected in history textbooks today; this has the effect of presenting the Greek Cypriots as the victims of Turkish Cypriot aggression, although the majority of the victims were Turkish Cypriot
Edited sentence: The Greek Cypriot official discourse follows an approach to the events of Bloody Christmas which according to Olga Demetriou "parallels denialist strategies", and  is still reflected in history textbooks today; this has the effect of presenting the Greek Cypriots as the victims of Turkish Cypriot aggression, although the majority of the victims were Turkish Cypriot