[Manthink]

FYI the two largest American ancestry are German and Irish then English.
German speaking was common before WW2.
Is country first then ancestry
of course some practise country second religion
and few religion then country.
never heard or see people put region then country 
Anyway Ozie already said Sg has little own culture left.
That I agreed, too globalized, in the end lack attract to retain its people.

We need to be aware how "American ancestry" is defined....

In terms anthropology, the REAL ancestry of US (and Australia) are the native Indians and Indigenous people, respectively.
Germans and Irish by-and-large didn't exist in N American continent until mass European immigrants in last 200 years, post US independents which itself was still founded on slavery of African ancestry...  The issue  is many today often read US history of last 300 years which, surprised surprised, are written by the pple of Europeans ancestry.