Ethnocentrism

[Plague Happy]

Ethnocentrism in Psychology is loosely defined as the inability to think outside one’s own cultural experience, and a tendency to assume that what happens in our own culture is common to other cultures.

My experience would just deem that as entirely due to: 'Either a severe lack of travel, a severe lack of internet, a severe lack of understanding—or any combination of those three.'

Well if you're in a western country you don't even need to travel. These days, the world comes to you. They call it a cultural melting pot. More like a cultural mess.