As opposed to what Wikipedia says, an American is not simply a ‘citizen and national of the United States.’ To be an American means to descend from the race of men that actually built this country. The ones who tirelessly fought for their independence. This part of American blood, so to speak— is simply the blood of the men the Founding Fathers actually intended to live and stay here.
We, the Europeans, are ‘Native Americans,’ while the original inhabitants of the land are ‘Aboriginal Americans.’ To us, both are of American blood by technicality. Though we do deny that they are one of us, or intended Americans for the country; not the history.
For more detail, read the manual, linked here:
https://archive.org/details/aunc-2024