This is one change that I don't have a problem with. I was just in Peru, Bolivia and Chile and trust me, they consider themselves, and are, "American". United States is much more precise.
Our Founding Fathers bequeathed, specifically, that name to us. We have had the identity “American” since our founding as a nation.
All throughout history, when the term “American” is used, there is no question as to whom it refers.
If American men don’t have the gonads to stand up for their identity, and passively allow another group to assume their identity, with their blessing, then the nation is over.