Well OP wasn't even referring to Native Americans, but I would disagree with you. You got the lebensraum backwards for one thing. He was talking about white European settlers pushing Native Americans aside for THEIR "lebensraum".

I hate to give this nasty hate a forum, but according to this book review of Carroll Kakel’s “The American West and the Nazi East” about the Hitler's views of the American West (https://wagingnonviolence.org/2020/10/hitler-found-blueprint-german-empire-in-the-american-west/):

"Admiring how the United States had “gunned down the millions of Redskins to a few hundred thousand, and now keep the modest remnant under observation in a cage,” Hitler spoke of his intention to similarly “Germanize” the east “by the immigration of Germans, and to look upon the natives as Redskins.” Echoing American justifications for westward settlement, he stated, “It is inconceivable that a higher people should painfully exist on a soil too narrow for it, whilst amorphous masses, which contribute nothing to civilization, occupy infinite tracts of a soil that is one of the richest in the world.” His answer? “Here in the east a similar process will repeat itself for the second time as in the conquest of America.” For Hitler, “Our Mississippi must be the Volga.”... As for resistance by those being conquered, killed and cleared? Hitler compared it to “the struggle in North America against the Red Indians.” After all, he said, “who remembers the Red Indians?”"

That doesn't sound very sympathetic to me.