Turkey's Erdogan orders the conversion of Hagia Sophia back into a mosque

[Belacqua]

is no Christian civilization

If you're just wanting to tease Masoni, polymath, and Sungula for their obvious bigotry, then I'd understand saying this.

However, we have to admit that there have been majority-Christian societies which were civilizations. 

Unless everybody wants to define "civilization" as a society that wasn't based on violence and had utopian equality throughout its existence. If that's the case, then such a thing has never existed.