You wanted America First. You got it. Did you think it wouldn't be conceived in national collectivist terms? The clue's in the name. It's America First, not Americans First.
Call me naive, but I increasingly suspect that much of today's "left" is not antiwar on principle. Rather, it's anti-American war because, in its view, America (not just the government) is rotten to the core: bourgeois, racist, patriarchal, heteronormative, blah,...