You're a carrier of American culture (at least in some superficial way) because you grew up surrounded by Americans. If 500 million people moved here, they would not grow up surrounded by Americans.
Well, okay, but there are multiple times 500 million people living in other countries growing up extremely not surrounding by Americans, and they are preparing to quash America's culture entirely in 100-200 years through economic dominance. Do you prefer that outcome?
