I don't like the author treating muslim civilization with the same respect he does for Christian civilization. I thought he had special fondness for Christendom but it looks like he's impartial
There is no "Christian civilization" (You are equating France the HRE, England, Scandinavia, Spain, Italy, Georgia, the land of the Rus, Armenia, Nubia and Ethiopia, because they broadly had the same religion. Lul, imagine being this unimaginative) or "Muslim civilization"(The Ottomans are not the same as the Arabs, Azeris, Persians, Sindhi, Berbers and so on, just because most of them prayed towards Mecca). And why should he not be impartial? Because it triggers snowflakes like yourself?