To answer most of the questions above simultaneously (to some degree):

I only care about the content of someone's character and how their actions impact the rest of the world, not the country they happen to be a citizen of, a fact which for non-immigrants (the vast majority of people) is completely random happenstance.

If already wealthy foreign agents become wealthier at the expense of impoverished Americans, I find that to be unfortunate. If already wealthy Americans become wealthier at the expense of impoverished non-Americans, I find that to be just as unfortunate.

I'm not going to cheer someone (athlete, business leader, or otherwise) on just because they are American. The fact that they are American is as irrelevant to me as the color of their eyes.

Do they seem to be a good person who treats others well? If yes, I will cheer for that person, whether they are American or not. Do they seem like an entitled asshole that treats others poorly? If yes, I will cheer against that person, whether they are American or not.

And the reason I currently label myself anti-America is that I believe that collectively we are the entitled asshole that treats others poorly. And we can't just pawn that off on Trump to be the scapegoat. He didn't materialize out of nowhere. We elected him. Twice. The second time after a failed insurrection. We have collective culpability.