These are some of the reasons I moved from civic nationalism to ethno-nationalism:
Because you're a idiot?
....But g'head....this oughta be good....
Racial minority groups will always pursue their own interests at the expense of the majority interest. They're not just going to accept the disadvantages of being a minority. I believe groups who are different enough to have strongly competing interests should be separate to pursue those interests separately.
I could say the exact same paragraph and change "minority" to "majority"....which is exactly what you are doing.
Even if the out-groups seem to assimilate, in times of conflict (economic depression, war, etc.) underlying racial divides will show themselves and make the conflict worse.
So; I guess we can kick out all the Irish, Italians, Poles, etc. because they were once those "weirdo furriners" who couldn't assimilate....oh wait!....
(Then again; You'll probably go, 'But they're whiiiiiitttteeee!' To which I'll respond, 'You didn't think so over 100 years ago and those Sicilians were pretty darn swarthy'!)
Even if the out-groups seem to assimilate, their children might not. You might select the best immigrants, but there is regression to the mean.
Ah! You came up with the "Perfect retort" to those who state that they eventually do assimilate. However; Your little moved-goalpost has been dismantled by a hoard of Buffalo Bills fans after winning the AFC Championships (We may have lost all 4 Super Bowls but we lost 4 consecutive Super Bowls! How many have been to four consecutively?) or beating the Houston Oilers in "The Greatest Comeback" back in 1993.
"Regression To The Mean"; So being unable to assimilate is "In the blood", somehow and not....I dunno....KIDS BULLIED BY PEOPLE LIKE YOU, HAVING AN IDENTITY CRISIS, THEN BEING MANIPULATED BY SOME WEIRDOS ON THE INTERNET INTO BLOWING UP STUFF AND BEING HORRIBLE! Psychology and Sociology is not a strong suit with you people. If a member marginalized group behaves badly, it's "something in the blood" or "devils" and not, "The adopted society is being a bunch of xenophobic jerks". Again; When a "foreigny" out-group is given full rights and respect, the dysfunction decreases....Ask any Irish, Italian, Pole, etc....
Even if the out-group seems to assimilate in small numbers, this might change once they get to a certain % of the population and they start seeing themselves as a voting/power block.
So a certain group wants to be recognized and also wants to have laws in place so guys like you don't treat them like garbage! OH, THE HORROR!
Voting patterns. Look at how Whites vote in the U.S. (majority conservative, close-borders, low tax) vs. how non-Whites vote (majority progressive, open-borders, high tax, wealth redistribution) and you can see the Whites pursuing their interests and the non-Whites pursuing their interests.
AYE! THERE'S THE RUB! You're mad that the "furrners" want to legislate the stuff that allows them to be able to fully assimilate and be respected as real Americans and you want to hold on to your undeserved "White Male WASP Privilege".
Also; A good chunk of Whites are "progressive, open-borders, high tax, wealth redistribution"....especially the Xers and Millenials. We've seen what your ways are capable of doing. We've seen (or at least heard about) Lefty nations like Norway and how those countries tend to be safe, prosperous, open, free, peaceful and awesome. We're realizing that the old ways of Patriarchal macho authoritarianism is the root of humanity's stupidity. The vocal young people who are into the Far-Right Neo-Nazi crapola are not a majority. They're just a bunch of grumpy edgelords being stupid. Many will snap out of it.
FIRST; A lot of nations are open-borders and those nations haven't exploded. There's actually a nice little cafe in Europe where the international border LITERALLY PASSES THROUGH THE CAFE (Or right next to it. I can't remember, exactly. It's just a cute little line on the ground. The town straddles two countries.)!.
SECOND; Taxes are essential to running a strong, functioning government. Countries do not run on Pixie Dust! Where do you think they get the funds for road construction/maintenance, road signs, streetlights, sanitation, snowplows, Police, Firefighters, EMTS, etc. Taxes are the dues you pay to "Join The Club". Yes; I understand that you don't like it. A lot of people don't like getting chemotherapy, either but they still need it to cure the cancer that could KILL THEM. Taxes are only evil if they overburden the poor....which is why taxes need to be based on a person's income. If you have more income, you pay more taxes. You can't get blood from a stone!
THIRD; So; One's taxes going towards programs that give the poor a helping hand (thus making it easier for them to both survive and be able to work their way out of poverty) is akin to eating babies? A working society and a working humanity is a humanity that helps one another for the greater good. When everyone's uplifted, everything thrives. Poverty is not a sign that someone's inferior or evil. Individualism is peachy and all but Collectivism isn't all-evil, either. You need a balance of both. Same with Capitalism & Socialism.
Finally; You are the True Minority....not just on an macroethnic basis but a political one....And humans are one race....which is native to Africa. All these differing macroethnicies are merely weird mutations in response to climate and UVA/B sun ray levels. Should folks who just tan easily be forced to the back of the bus?