I always advise non-Americans to see "High Noon" and consider it an allegory, for an idea of how Americans think of themselves and their role in the world.
I used to think the same thing, until I discovered that the "allegory" is something along the following lines: Ian MacDonald/Sheb Wooley/et al, as Frank Miller/Ben Miller/et al, are the evil Joseph McCarthy and the House Un-American Affairs Committee, and Gary Cooper, as Marshal Will Kane, is the valiant Hollywood Marxist, bravely battling the forces of GOP tyranny and oppression.
PS: I kid you not.
High Noon is on my list of great patriotic movies. Of paticular interest is when his wife comes back and over her religions objections saves her man.