The whole thing is not functioning for anything good in people. Natural selection should favor those who avoid it, they are more efficient. Incredible amounts of energy are spent on war, those who do not spend so much energy for no return should be favored. Cut- very true, and the eugenics was based on false premises, false premises that were obviously false at the time. Hitler simply ignored observations he didn't want to deal with, like the ability of Jesse Owens and Albert Einstein.
People practice eugenics all over the world and have done so for many thousands of years.
The strongest opponents of eugenics have practiced it. There is nothing wrong with eugenics. It is eugenics on false premises that causes problems. Anything based on false premises will cause major problems if people take it seriously. I posted how it would work, you just repeat that you don't see how it would work and ignore the logic of how it could work.