> if we find out we are looking at an American's data we're —supposed— to throw it away.

Keyword emphasized, and anyway ahat safeguards are there to ensure that they won't turn against "undesirable" Americans at any point in the future?

Like how the American citizens of Japanese origin were more-or-less extra-judicially just herded into camps back around WWII, and the perceived "risk factor" of American Muslims right now.