Statehood is defined via citizenship aka Passport
I am a born RSA citizen and also obtained a German citizenship at birth due to my parents being German citizens - but they are Bavarian's.
Ethnicity is defined via language, cultural traits and physical features.
My family traces back to the 13th century - since the 15th century my ancestors have lived and been registered in Bavaria - I presently reside in Bavaria, I speak multiple Bavarian dialects and I follow Bavarian traditions and it's culture. I also lived more then 40 years in Asia, the USA and the RSA.
So what am I?
A 100% Bavarian with a German passport, who beholds a world view.