The thing is, the disproportionate knowledge about what's going on in the Staten Island borrough of New York City is mindboggling. And how different the people is, to let's say those who live in Bronx.
And how we were invaded with anecdotes of Northern (Yanks) vs. Southern (Dixies) things. How the Texans, New Yorkers, Bostonians have their own accents, the East vs West coast thingy, why Chicago and NYC are liberals.
Now, nobody knows how distinct Indians or Chinese are. Tankbuster could be a Bengali, Tamil, Gujarati, Ladakhi, Sinhalese, or hunderds other groups... The Chinese, they also have that Southern and Northern thing, the coastal and the mountainous people, the central land, the northern land, the Tibetan, the Uyguhrs, etc. They are also different in culture, the way they live, how they view and perceive foreigners, etc. The only country that is quite homogenous is like Japan or South Korea I guess.