We need to take a closer look at China born Chinese that grew up in China. They are very likely Chinese nationalist. It's complicated but a lot of these younger generations in China are so brainwashed to the point they truly believe they owe CCP/China.
They come to the US/west for economic/academic reasons. They might want to stay in the west but their heart and mind still loyal to China/CCP. They are so dumb that they can't differentiate China!=CCP.