It’s not like other countries do not do this. They’re just not so prone to virtue signaling as in the US.
Countries do not do, things people do.
Dehumanising “the others” is a human trait, and a very destructive one. Just like violence and greed. People have different susceptibility for these, but we should all work to counter them and it is in its place to point it out when observed.
I've never seen any other democracy use so extensively the kind of duality between the good guys and bad guys, as Americans like to say. There is a total lack of nuance and a very widespread message about how the US is special and best than anything else in the world, so everything is justified to assure its primacy. It's the kind of thing you hear from totalitarian and brainwashed countries.
I know this is not everybody in the US, and I say this as a foreign person that observes things from outside. I agree with the two statements you made, I just think they could be incomplete and that the countries that behave most similarly to the US are not democracies.