"Us" versus "Them" may seem idiotic to idealists and Starfleet types but when it comes down to it everyone always choose "Us" every single time. There is no shame in favoring your "Us" 👀
Discussion
The Venn Diagram of everyone's "Us" expands to include all peoples, everywhere... Except "Them" 👀
"Us" would refer to "positive Nationalism", but that's far from the only kind.
Positive Nationalism: "America First, IDGAF about the others!"
Inverted Nationalism: "America Last and Worst!"
Displaced Nationalism: "Israel First, IDGAF about America or others!"
Non-Nationalists of various types, by contrast, are much less of a threat to Positive-Nationalist policies.