I wonder whether there's any actual examples of the values being brought back from a point where they have disappeared.
Probably another interesting definition of American values would be the ones held in foreign people. Sort of in the same way there’s who you are and then there’s the person in the minds of everyone who knows you. Except the US is a super power that’s done a lot of steering the world over the last century and that’s instilled some common practices across the world. Like citing CDC guidelines or using the US currency for reserve.
I'm sorry, I don't quite understand what you're saying here. Are you asking about examples of people that have been de-radicalized?
Uh, it's not that kind of belief system. The notion that we should order society by measurable things is not necessarily a universal belief, even if it's one I agree with personally. Last bastion apocalyptism like I've described doesn't really do "measurable".
So far, to date, every secular and atheistic culture tends towards inverting the demographic pyramid by having about half the required number of offspring to stabilize their culture/viewpoint through time.
This view assumes that there is any meaning to life, of course.
There's a very present "last bastion" framing in most of the right-wing media I track. It'll depend on exactly what the foundational beliefs of the community are that drive this framing -- John Birch society derivative folks arrive here via a different path than white supremacist survivalists and them a different path than evangelical fundamentalist Christians -- but it's common enough. It goes hand in hand with the notion that the US has fallen from the ideal set forth by the Founders and that only your in-group really gets it and has a hope of restoring it.
Alex Jones is a good, mainstream-ish example. Dude's a Bircher and has spent decades coaching his audience to believe that Globalists are in league with Satan and intend to destroy humanity, if only they could get the US out of the way. Satan/The Globalists are _this_ close to succeeding. Once they do, Real American Values will disappear from the world, ushering in the post-human era. Jones preaches survivalism (sorta, feeding your neighbors to your daughters will give your daughters prion disease) to his audience and I hope you see how the two strains of thought would fester into a framing like you've called out.