Some people are fascinated by history, and some aren't.
I fall into the latter category. I think it's fascinating to look back and see what we can glean from the past.
Especially since so much of that past can have strong influences on our present.
But as a point of order, Ethnicity isn't the same thing as Nationality.
Ethnicity is about culture, Nationality is just country you live in.
I could easily say I'm Yankee New Englander as well as what...part third-generation Sicilian American.
Which means I pronounce Italian words differently than someone from New York or New Jersey, who'll in turn pronounce them differently than someone from Sicily today.
Why? Because my ancestors came over before Italian was standardized, so those regional accents hadn't been merged yet.
How Capicola Became Gabagool: The Italian New Jersey Accent, Explained (atlasobscura)