To see if they are trying to provide bias or persuade or be one-sided in their claims. Also to know what was their purpose of providing the evidence was for. The author put in the time and effort to create the source so what was his end goal to accomplish for the reader.
Both the Byzantine and Islamic empires rose at the demise of the Roman Empire. The most notable difference between the two was their religious practices. The Byzantine Empire consisted of Orthodox Christians the Arab (Muslims) empires were engulfed in Islam. Although different, both religions had similar tenants.
