Rambling thoughts incoming.
He's not wrong, per se, in that in a perfect world nobody would ever be treated as an outsider to any community based on appearance or ethnicity alone. However, I hope I can be forgiven for saying that, having lived as an American in Asia- the majority of my time being in China-for almost 5 years now, I read this and immediately I know his type. Constantly flaunts his understanding of China's "rich culture and history," dresses in cheap touristy costume versions of old imperial clothing, dissociates from and even looks down upon other westerners in China. Generally very obnoxious and cringey to be around, for both westerners and locals alike. Gets really upset when locals speak English to him, demanding to be regarded as a fellow Chinese. I've met people like this and they tend to have a chip on their shoulder and generally not be very nice. I can't necessarily assume all of that about this guy, but if it quacks like a duck...
I know identity is important to a lot of people, but in this case I can't see why people like this guy want it so badly. Understand that you're coming to a culture that has been extremely homogeneous for thousands of years. Yes, there are minority groups among the Chinese, and the dominant ethnicity has changed a few times, but as a westerner you're still a far cry from what has been the norm for millenia. Not only that, but this guy definitely knows how important heritage and family lineage are in this culture, so to come in with no family ties to Han Chinese and say "how do you do, fellow Chinese?" Just won't be taken seriously. You're talking about wanting to be accepted as part of a culture while trying to change an integral part of it. Like it or not, call it outdated thinking or whatever, but to most Chinese, being Chinese is in one's blood. I agree that this is ultimately a bad thing for social progress around the world, but you're not gonna change that notion for 1.6 billion people with a whiny, ego-driven, and largely self-serving opinion piece.
Again, I personally can't fathom giving a shit about this, but I've met quite a few guys who do. It's odd to me that someone would go to a country where they'll obviously stand out in a crowd and stay for so long if they're the type to be sensitive about it. I personally never gave a shit whether I'm thought of as a Chinese or American or goofy looking big nosed laowai or whatever. I'm not bothered by the weird stares I get in public or the random "hello!" or people taking my picture. I don't see it as patronizing when people tell me my Chinese is good, and it doesn't bother me when people go out of their way to speak English to me.
I might be missing the part of the human brain that makes people really want to fit in to a predefined identity, because I can't figure out why it matters. Either way, I'm not sure walking around with a chip on your shoulder in a goofy costume is the best way to achieve it.