I'm feeling that most of us have said what we intend to say in this discussion, and now we're starting to repeat ourselves. I'll address a couple of loose threads, but then I'll probably step away from the discussion soon.
1. Is the US my personal private property?
Is it morally wrong to stop someone who desires it to enter one's home? Do you believe in private property? Do communities have no right to determine who belongs and who doesn't?
This is a flawed analogy. My nation, my state, my town, and my neighborhood are public spaces, in a way that my house is not. My house is my own personal private property, and I get to say who lives there. My state, town, and neighborhood are public spaces (containing privately-owned spaces, but the state/town/neighborhood itself is public). A person can enter my state, town, and neighborhood without showing any kind of credentials, and they are allowed to buy or rent a house in my state/town/neighborhood regardless of their ethnicity or nationality.
The nation is somewhere in between. It's a public space with a regulated border. You have to show credentials at the Canada/US border, but not at the NY/NJ border.
As to what's practical, and what's morally right, I have some thoughts below.
2. Immigration and ethnicity
And do you live in a predominantly "white" area by any chance?
It's interesting that you ask the question in this way. My neighbors who are first-generation immigrants from Ukraine and Germany and England are "white". Most of my African-American neighbors are from families whose ancestors arrived in the US 300-400 years ago, so they're definitely not immigrants.
Is your focus on immigrants, or on non-white people?
To answer the literal question in your post, here's a graphic from Wikipedia about the demographics of my state:
(Source:
New Jersey - Wikipedia )
3. Preserving American culture
B. Western nations desire to preserve traditional Pre-WW2 majority culture and ethnicity by reducing or halting mass immigration from non-western countries.
Preserving American culture is (mostly) a good thing, and the desire to preserve it is sensible.
Preserving American ethnicity is something else. I'm not sure exactly what American ethnicity is, as we've had many waves of immigration over time. And historically there have been attempts to preserve purity of ethnicity that were really bad.
(I'm not in a position to say what it means to preserve culture and ethnicity in European countries, so I'll let members of those countries speak for themselves.)
4. Sensible approaches to immigration
Immigration is a complicated issue. We've put together a pretty good culture here in the US (not perfect, still needs improvement, but more good than bad), and that's worth preserving. Our culture is a tapestry made from the threads of the many cultures of origin of the people who came to North America. I envision adding new threads to the tapestry in a way that enhances (but doesn't overwhelm) the overall picture.
What that comes to, in terms of immigration legislation, is challenging to work out. Note that there's a great deal of space between "Let everybody in" and "Don't let anyone in unless they're European Protestants". Somewhere in that middle space is a satisfactory immigration policy.
I do reject a few solutions. I reject the solution of excluding everyone from country X. I reject the solution of excluding everyone with brown skin. I reject the solution of excluding everyone who practices religion Y. I reject the solution of excluding everyone who is non-religious.
But there can be other ways to craft immigration policy, to explore that middle space between "everybody" and "nobody". And we have historical precedent for people from multiple parts of the world being able to craft a community that works.