One fact that stands out in my mind is the very small percentage of minorities in special forces.
When I was in SF, there were LOTS of minorities- Hawaiians, Samoans, Guamanians, Tennessee ridge-runners and bootleggers, some Eastern Europeans, even a veteran of the Foreign legion or two.
There were some black professional soldiers- who met the standards that everyone else had to meet.
Since then, there has been aggressive recruiting for "minorities"- now defined almost exclusively as "black".