The different political alignments are really just different sects of the nationalism/religion. Liberals simply idealize a different subset of the core tenants, and maybe are more tempered in their zealotry. But they are nationalist to their core nonetheless.
Having said that, there certainly are other groups that don't prescribe to Americanism, and are loyal to other 'religions' be it globalism or some other political ideology that's incompatible with American ideals.
I would even argue that Bitcoin is itself a flavor of globalism, albeit one that the establishment global elite aren't cool with, because they missed the boat on being early adopters and their power would be radically diminished if it wins.
I personally disagree with that politics as war perspective, as well as with the false equivalence
> We have our sacred texts (Constitution, Declaration, etc) and our genesis story (War for Independence).
> We have our temples (capitals, court houses).
> We have our core beliefs (representative democracy is good, all men are created equal).
I'd be willing to bet a month's worth of my income that a majority of the population doesn't view it this way. The only people I know who view things this way are very far to the right (and this group is not the majority on the far right by any means).
The only part I'd be willing to bet is shared by more than 50% of the population is that all men are created equal (in theory at least; there are plenty of people with disabilities who would disagree that they are viewed as equals in practice; you needn't think too far beyond who would be sacrificed on a deserted island first and without much conflict).