Complex sentence: The majority of the Syrian diaspora happen to be Christians of the Eastern Orthodox Churches and Eastern Rite Churches which is a local form of Roman Catholicism goes back hundreds of years before the Islamic Arab conquest of Syria in the 8th century AD.
Split into simpler sentences: The majority of the Syrian diaspora happen to be Christians of the Eastern Orthodox Churches and Eastern Rite Churches, which is a local form of Roman Catholicism. Syrian Christianity goes back hundreds of years before the Islamic Arab conquest of Syria in the 8th century AD.