Because if you're going by "casual daily encounters" that seem racist to you, do you ever wonder if a minority in 21st century america experiences the same?
Maybe I have to go further south, or be more homosexual or something, but I haven't experienced the hardcore racism you're describing.
That being said, youre definitely onto something. Why should I be pissed that there aren't Chinese folks in cinema when I know that China has it's own massive film industry? I know what it's like being part of a massive majority, but some other asian kids I grew up with might not; they only have America, and they would be more foreign in Asia than here. I feel kinda bad for them, because despite being Chinese, they'll only feel different, instead of proud of being part of a great civilization/history.