Dont understand why you guys feel so warmly about Hitler&Colleagues. They lost and made eugnics one of the highest taboos for almost a century now.
A successful eugenics program actually cures inceldom at the roots: the unfair distribution of highly desirable genetic traits. Imagine a world where everyone is a 9/10 at least, not only in looks but also in physcial health, intelligence, dick size, mental health, you name it. Imagine every boy growing up with the absolute knowledge that he is more than good enough for any partner he could desire. Imagine a world where free love actually works because everyone is easy to love (at least physcially, though again, IQ, personality, mental health, all highly heritable).
Eugenics could have actually given us that world.
Before WW2 the World Eugenics Foundation was in part filled with leftists hoping to lift up the lower classes to create a truly equal society. Obviously they weren't very popular after the war.
We are slowly reaching the tech required to realize this the direct way. Who knows how far we would be if eugnics could have been a viable political platform, if rivaling nations would have looked into the future and thought "Mhhh, if another nations breeds the smartest, most well adjusted population ever in the history of mankind we won't be able to compete, we need to try to do it before they can!"
Wouldn't even have required violence. Remove criminal genes by offering inmates better condition, shorter sentences or just money if they get themselfs irreversibly sterilised. Financially support women who choose to have a baby with a high gene quality sperm donor. Just pump money into the research.
You might feel connected with the enemy of your enemy, but there is a chance your life wouldn't have been so painful if the war never happened.
(Also, no, looks don't relativise strongly, so even in a sea of 9/10s they don't drop back to 5/10s, for the same reason junk food is so irresistable: there was no evolutionary incentive to cap your desire for hard to aquire and highly energy dense foods, there sure as hell was no pressure to make you stop wanting to fuck hot women.)
