Why?

Why in other countries do people consider their ethnicity more than the country they were born in? I see a lot of koreans who consider themselves as korean instead american
But here in Brazil there's a lot of Japanese and 99% of them consider themselves as Brazilian and not as Japanese itself. Why?

idk ask them

Because Brazil is one of the most multi-ethnic countries in the world and thus nationality is a better way to integrate all ethnicity, something similar is true for India

"I see a lot of koreans (parents) who consider themselves as korean instead american" what?
"But here in Brazil there's a lot of Japanese and 99% of them consider themselves as Brazilian and not as Japanese itself." not true

Some people think it's a dishonor to fit in and adopt the country's traditions

Idk. My parents are North Korean escaped to South and I always consider myself South Korean

Cause Brazilian is not a nation its a mix of all nations..portuguese, native brazilians, europeans, africans and asians

Because US is one of the most diverse places on earth, there isn't one type of people that u associate with America, like Americans could be 20 different ethnicities

Copypasting this from a thread asking about what race Brazilians are:

There’s no such thing as “American (US)” or “Brazilian” ethnicity (unless you count the natives, but they’re now a small minority unfortunately). Instead, you are American (US) or Brazilian if you were born there. There’s a reason why most countries in the Americas have birthright citizenship (https://worldpopulationreview.com/country-rankings/countries-with-birthright-citizenship). Brazil in particular is a diverse mix of European settlers, American natives, imported African slaves, and even some Indian and East Asian immigrants. But they’re all Brazilian if they’ve been there long enough. This can be hard to understand for Europeans who have a strong link between ethnicity and nationality, but we have to remember that this is not the only way to define a country and is just the way Europe does it

TLDR: To be Brazilian means to be from Brazil, not to be of a certain ethnicity or race

So basically, what this is saying is that countries in the new world tend to do it by birthplace while in the old world it’s more by ethnicity.

because nobody wants to be called an American. being American is an insult nowadays