One thing you realize as an HKer in US (born in HK, grew up in US), they don't give a shit, they can't tell the difference between a mainlander and HKer.
That's what they don't realize. They don't care, you are all "Asian/Chinese" to them... even Koreans and Viets.
Maybe "being different" is good to your ego, but at the end of the day, if China becomes a Superpower, all Asians benefit from it.
The problem is many people from Hong Kongers would spend plenty of time to explain the difference between China and HK. lol