The lines where one culture begins and another end are pretty blurry 

Like are Jews and Christians different cultures that don't mix?

How about American conservatives and woke pink hair communists, both of English descent?

Hip hop artists and skateboarders? 

To me I think it comes down to just respecting a common law, whether that is religion or state, some kind of common thread - which I would have hoped would be individual liberty but not many believe this these days