It's obvious that I wasn't born or grew up in the U.S..
Not really. I know people just as antagonistic, wrong, and rude as you who come from the U.S.A. It's not a function of where you come from, there's always at least one in any crowd. It's not American, French, Rumanian, or anything-ian, it's a universal property of human beings.
I could easily imagine that you're just a flamer who wanted to get into a fight, who hopes sincerely that they can continue to hide behind their "Ion" anonymity, like the spineless coward they are. If so, however, they would be quite consistent and monomanical in focus, indeed.
In the U.S. I don't have family or friends, everybody to me is a stranger, I speak a foreign language because I was imported based on skills that lack without me.
You've made that claim "imported" repeatedly. It seems like an odd way for you to state things, to say the least. There an any number of obvious questions one might ask, given your offensive attitude, but I am, frankly, being very patient with you and not asking those questions in the hope that you'll suddenly see the light of a cloudy morning, at least.
As to friends, well, if you had manners, you behaved in a civil fashion, and you didn't act out on your prejudices, you might have some friends, and perhaps eventually some family, assuming, of course, that you desire either. (I've no idea of your personal preference on this issue, ergo I qualify my statement.)
If you don't want to be a stranger, show at least a modicum of manners when you talk to people. It's not exactly mannerly of you to launch into a discussion with a bigoted remark like your bit about americans being ugly, stupid, and ignorant. Remarks like that won't make you either friends or less of a stranger. They will, however, harden peoples' attitudes about you very quickly.
Never mind Stanford, Columbia, etc, where 'publish or perish' happens.
You should consider the questions that raises immediately before you continue in that direction. One might question why you didn't mention MIT, Georgia Tech, or that sort of place, too, of course.
By who, you asked?
Ask the Immigration and Naturalization Service and the U.S. Department of Labor by who and how.