The Crusaders simply called themselves Christians; the Byzantines and Muslims called them “Franks”. The Byzantines called themselves romios; Muslims called them giaours (infidels) or Greeks, in contrast to the “Franks”; Catholics called the Byzantines griffins. Muslims called themselves Muslim (obedient to God); the Byzantines called the eastern Muslims Turks, and the crusaders called Saracens.
Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.