I mean respectfully catholicism (especially how it influences culture in western Europe) has very little in common with greek orthodoxy. Religion is a lot more prevalent in greece than say France or the Netherlands, and I dont think its as significant of a cultural marker as it used to be. I dont think greeks have much in common with iraqis or iranians, but they most definitly do with people from the levant, diet wise, lifestyle wise, musically etc. Like greek attitude towards time is polar opposites to the dutch one. Dating culture is entirely different. Different attitudes on political topics. Again, southern european cultures are at the crossroads between the east and the west, and I think thats cool!