In other words, the Americans as illegitimate occupiers.
Yours is the rhetoric of Rudy Acuna in Occupied America, the real "screed" that you are taking your cues from ("We were always here. Dees Eees Ahr Lahnd, Greengo!").
I assume nothing. I lived it. You clearly did not. Not one thing is wrong. That's the way it was, and in many ways still IS, at least in Arizona - although the Left (you) has been trying to break it down with Revisionist History for the last 40 years.
You are the one who is behaving like a leftist in your attempt to re-write history.
And you are acting like a leftist in your ascribing motives and statements to people when they never said any such thing.
It is sad really.