I'm saying, no, that's a gross exaggeration, made for ideologically motivated hyperbole effect.
I'm saying that it likely won't be more than 1 in 10,000, or at best 2,000 Americans nation-wide of all races and appearances, if that, that will be stopped and questioned about their citizenship.
And I'm saying that because law enforcement simply does not merely go on looks in a situation like this, and it's preposterous ideological posturing to say that they do.
Law enforcement will also be looking at behavior and reflecting attitudes before detaining someone.
So, knowing how law enforcement works, I see no basis for your extreme exaggerations, extreme exaggerations that merely function to create unjustified hysteria.
And regarding your phrase "based merely on suspicion", last time I looked, "suspicion" in the eyes of law enforcement is exactly what a stop and momentary detaining in such a situation as this would logically, rationally be based upon, a justified suspicion based on multiple relevant criteria in the matter.
A true American citizen is opposed to illegal immigration as illegal immigration is a crime against fellow American citizens.
No true American would support such a crime against their fellow American citizens, and any American who condones illegal immigration is a complict accomplice to the associated crimes, in effect, a Benedict Arnold to fellow American citizens, and to America itself.