Well, if he said this on his TV show, it *IS* an American show, so he would be speaking to Americans. I'm just saying that sometimes people get caught up in using certain language. It's a little odd though because usually scientists are much more "stateless" people than your average citizen. IE astronauts (unless they are military) look at their fellow cosmonauts and others from all over the world as fellow space travelers, and don't see any differences. And people like Darwin could care less if you were born on one or the other side of an imaginary line. Scientists rarely speak in terms of political entities; they usually speak in fact and logic.
I remember the first thing they teach you in public speaking is know your audience. If you are speaking to Americans, and you want to get them to solve a problem, you will probably have success if you appeal to certain American features like Thomas Jefferson, etc. ESPECIALLY if you are talking to the masses and not free thinking libertarians who make decisions based on ideas, not emotions. It's one thing to appeal to a certain demographic when you are talking to them. It is another to say that something is the responsibility of one nationality or sex or race or political subdivision alone. It's not clear to me that Nye was doing the latter.