>there has never been a coherent German culture

By that same logic there has never been “a coherent Chinese culture”, therefore Chinese people do not exist or deserve to have their own country.

What are your requirements for a “coherent culture”? Every country in the entire world has some variability within its culture depending on region.

Whatever your criteria are for a coherent culture, I’m sure China or India would surely fail them. Yet to deny the existence of Chinese culture or Chinese people would not only be extremely offensive, it would be genocidal language.

Denying the existence of cultures and ethnicities is a hallmark of genocide in fact.

>The United Nations and atrocity-prevention frameworks identify the denial of the existence of a national, ethnical, racial, or religious group as a core risk factor or precursor to mass violence and identity-based conflict.

https://africarenewal.un.org/en/magazine/reject-genocide-den...