I come from a family of recent immigrants. We're considered white so we get a pass for behaviors that our nonwhite peers get side-eye for. My ethnicity has its own enclaves. Those enclaves get treated as a cute cultural artifact rather than a threat -- even worth visiting on a tourist trip. My ancestral culture lives under the protective umbrella of "Western culture," but in practice, the overlap with prevailing Protestant/Anglo culture is minimal along almost any axis.
And yet, we are all American by almost any reasonable definition. If anything, the people beating their chests for having some random ancestors on the mayflower or whatever are the impostors here. What have they actually done for this country?
Also, I'm kind of surprised that you believe these things as a black man. You do realize that a large percentage of the country doesn't consider you "true" American either, right? They can't kick you out, but they will do everything in their power to disenfranchise you and turn you into second-class citizens. The signaling could not be any more clear.
Yes, it is hard to pinpoint exactly what makes one an American. It is not hard at all to pinpoint what makes one an X for any given European nation. It is strange how much Americans project our weak identity to the rest of the western world.
Except: exactly the same rhetoric is being used by the far-right in America as it is in Europe and the Anglosphere. Strength or weakness of identity is irrelevant to the white nationalist project.
What epistemic value does "similar rhetoric" have? The relevant question is whether something is true and/or defensible. Identity does matter, to some nations and historical contexts more than others. It is silly to project the particulars of the US historical context to the rest of the world.
The exact same argument would apply to the racial politics of Nazi germany or the Jim Crow South.
That doesn't answer the question. Identity does matter. Because Nazi Germany came to the wrong conclusion does not invalidate every premise used in their justification.
What was wrong about their conclusion that isn't equally wrong about the conclusions of these other white nationalist parties?
It's pretty clear to me that all these parties have racial animus (not ethnic identity) as their core, and we all know where that leads.