I am American using this site, too.
Only I am also a naturalised Brit.
It's been nigh on 7 years since I set foot in the US.
I never called my mother 'Mom'. Her mother was French and her father Mexican-American.
It was always 'Mama' with the stress over the 'ma' in the first syllable.
You see, America is very large geographically, and even more so ethnically.
There are so many subtelties, so many even what you what call racial prejudices.
All within even one state.
So it's impossible to generalise.
The place where I grew up, it is America.
In the sense that an Israeli man was sent to teach us, in our local comprehensive, and we sat to hear him start his lecture.
And he said, 'I can count 7 different races here, and you are not fighting. You are just here to listen.'
Name me a place where that goes on, elsewhere?
Can one?
I wait, I tell you, for I am foreign here, and my passport is maroon. And my elder girl she doesn't look like mine. She is tall and slim and her skin is white and her eyes are green and I could never mimic her voice.
I could only do like my father and shrug and look over your shoulder or stare in the distance because that is what in Indian does and my white skin is pock-marked and my hair is grey before any Mayan's would be.