>>109280112>conflating race with cultureRegardless of whether you fall on the nature or nurture side of the "what forms a person" debate, most people are raised by and influenced by the culture of the parents, who will be of the same race of them.
Are there a ton of black folk who are descended from slaves who were basically raised by WASPs and took in their culture to the point that there are only slight cultural differences between them and the decedents of the WASPs, sure. Does that mean that if you slap 10,000 Somalian families into WASP neighborhoods, they'll all assimilate in the same way? No, of course it doesn't. You typically don't form rules based around the exceptions.
You need only look at Vivek Ramaswamy to see that even being born in the US and surrounded by US culture doesn't stop him from taking on the Izzat culture of India, likely passed on to him by his parents or other influential relatives.
And above all else is that the blind import of anyone who will work for cheap is not a good policy and that while civic nationalism would be the ideal, it's not realistic to expect it to work out, and you can't make government policies based on unrealistic ideals.
You can't realistically feel out someone's personality in the time an immigration procedure would take. Choosing people from countries that have cultures close to yours is the closest alternative, and ethnicity/race is the factor that will get you the best guess in a short time for whether or not someone's culture is compatible with yours.