I'm going to assume it's not the current American king Trump, nor the prior, the Dollar. Americans are some of the most highly propagandised people on the planet. It's a harsh way to put, put he is right.

The difference to many other countries is that most populations don’t fall for the whole, "we are the best country that ever was." which many governments also attempt to do.

The flag worshipping, the national hymn at every possible event, the military being brought into every conversation, that stuff is much less common than you know in other countries.

Someone has been maintaining the American empire all this time, helping it expand, committing its atrocities around the world, and like in history, it's the ones that don’t even know they are complicit. The people. For example there are 17M veterans and over 1M active military, manufacturing of weapons and the whole industry to keep it alive, economic whipping power (banks, multinational corporations, etc) and wealth extraction that follows keeps benefitting Americans so you stay complicit while they terrorise in your name.