Earlier quoted context omitted.
> What sort of logic supports that American values are those held by a minority of Americans. What possible values suggest they are the normal ones? America has been here for a long time. It's fair to say that values which are of long standing, still held by a significant fraction of the population, and them disproportionately descended from ancestors who have been American for many generations, are more American val…
> values which are of long standing, still held by a significant fraction of the population, and them disproportionately descended from ancestors who have been American for many generations, are more American values than ones which fail one or more of these criteria So, in an Oregon context, this would mean the values of the Chinook peoples?
For starters, we're talking about Eastern Oregon, so if you wanted to throw a gotcha, you should have gone for the Paiute.
America is a nation, and it took its time getting to Oregon. The Chinook were never particularly numerous, nor influential on the values of that nation. That's just a fact.
The Iroquois League was more influential, the Founding Fathers were very impressed with their system of governance, though how much of that made it into the Constitution is a matter of debate. Painting with a broad brush, centuries of contact with the native peoples of this continent has certainly left its mark. The Western ethos of self-reliance and freedom owes a lot to them.
The Native American people are both their own nations and a part of the American nation. Speaking as one American, I'm inclined to value their contributions, but it seems a bit presumptuous for me to say that Apache or Navajo values are American values.
To continue down the road you've set us upon, the American descendants of slavery went unheard for many years, but starting no later than Frederick Douglass became a key part of shaping the ethos and values of the nation. They insisted that "all men are created equal" meant all men, and put an end to white supremacy, which was certainly an American value and just as surely is no longer such.