Read the first three immigration acts passed by Congress in the immediacy after ratification. They're online.
OK, I now know what you are referring to - the Naturalization Acts of 1790 and following.
I reread them to refresh my memory. Thanks for pointing to them.
I agree with you in the sense that they were thinking “white” - the civilized world they came from.
I doubt they could see where things would go.
It was wise of them to require a period of legal status, lengthy enough for someone new to our
system to learn how things are done here. I note it was lengthened during the French Rev.
Still, affluence was not a requirement, or education or country of origin - just a demonstration
of good character over an extended period of residence, and of course, being white.