The point is that euopean americans perform strongly compared to europeans, asian americans perform strongly among asians, and black americans perform strongly compared to majority-black countries. Each demographic as the top of demographic peers internationally.
Most countries don't release fine-grained data but yes when you compare against other countries that are essentially ethnostates – Japan, Poland, few others.
Yes, and I don't think this is racism any more than other DEI/education initiatives that focus on one demographic more vs. another. Everyone talks about trying to get more blacks into gifted programs or selective high schools like Stuyvesant. This is scoping the problem, nothing more.
