Those people aren't really "Americans" in any meaningful sense, even if they happen to hold US passports.

Once they're done with the US they'll just move onto the next country, same as they moved onto the US once the British empire was done.

They're just locusts

I don't disagree that they're locusts, but 'American' has been leaning heavily in the same direction as locusts for a long while. That's why they currently hold US Passports, the most fertile breeding ground.

From Network (1976):

You are an old man who thinks in terms of nations and peoples. There are no nations. There are no peoples. There are no Russians. There are no Arabs. There are no third worlds. There is no West.

There is only one holistic system of systems, one vast and immane, interwoven, interacting, multivariate, multinational dominion of dollars. Petro-dollars, electro-dollars, multi-dollars, reichmarks, rins, rubles, pounds, and shekels. It is the international system of currency which determines the totality of life on this planet. That is the natural order of things today. That is the atomic and subatomic and galactic structure of things today! And YOU have meddled with the primal forces of nature, and YOU... WILL... ATONE!

Am I getting through to you, Mr. Beale? You get up on your little twenty-one inch screen and howl about America and democracy. There is no America. There is no democracy. There is only IBM, and ITT, and AT&T, and DuPont, Dow, Union Carbide, and Exxon. Those are the nations of the world today.

What do you think the Russians talk about in their councils of state, Karl Marx? They get out their linear programming charts, statistical decision theories, minimax solutions, and compute the price-cost probabilities of their transactions and investments, just like we do.

We no longer live in a world of nations and ideologies, Mr. Beale. The world is a college of corporations, inexorably determined by the immutable bylaws of business. The world is a business, Mr. Beale. It has been since man crawled out of the slime. And our children will live, Mr. Beale, to see that... perfect world... in which there's no war or famine, oppression or brutality. One vast and ecumenical holding company, for whom all men will work to serve a common profit, in which all men will hold a share of stock. All necessities provided, all anxieties tranquilized, all boredom amused.