Your knowledge of American mythology seems a bit sketchy and the mythos is a far cry from reality saltinesandcoffeecups
Europeans didn't immigrate and follow the laws of American Indigenous nations they immigrated to as you keep saying that immigrants should (hint: claiming refugee status at the border is meant to be legal, but the US keeps ignoring that). I would think that was common knowledge though more often the myths like to pretend that American Indigenous peoples had no laws. Those stories are wrong. A lot of American Indigenous leaders did some fucked up things to try to make deals with Europeans, but nothing in what happened during colonization could be described as legal immigration.
Those colonizers 'crawled through the window', provoked wars between different nations, arranged deals and broke them, and raped little girls and claimed them as their wives and then tried to make claims on the lands of their families. That's and war is what the US is built on (a country that's less than 250 years old, has been at war for over 220 of them).
As someone who is the result of all that who immigrated out of the US (I can "look down" on my birth nation all I fucking want, thanks - if they're going to keep tracking my bank accounts, I can discuss the reality of their history), I am regularly amazed how much people out of the US - who weren't raised with those stories being pounded into their heads for years - somehow still buy into the myths they pump out. Like, how can you look at US history, see all the dead bodies and destroyed & erased nations, and say that it's built on legal immigration. Why kiss their ass, they don't care about you.
Ellis Island started in 1892, Angel Island on 1910 - even in the US, immigration control by Americans is comparatively new historically (when anyone else tried to control it there, they killed them - that's a large chunk of why they've been at war so long). Immigration control period as we have today is historically and socially very modern.
And don't forget about when the US government expelled Latinos just because they could - the impact of "Operation Wetback" people, many of them US citizens, forcefully deported to random parts of Mexico (even those that weren't of Mexican descent) - we're talking millions of people. But sure, tell me how much I'm meant to love America and appreciate their love of immigrants.