That's kind of where the appeal lies in them, for me. I like the idea of a group taking power, and eliminating the genetically subhuman like myself, so that humanity can go in the direction of progress and joy, as one strong, beautiful race.
It will never happen, but, still, a pleasant fantasy.
you are deeply mistaken my man
reality is, looks arent very useful for anything except seducing a femoid. selecting for looks alone is complete retardation, it would be dysgenic (the polar opposite of eugenic) as fuck, and that is what is happening now in the modern world.
nazi eugenics were attempting to do the opposite - they wanted to select for traits that were actually useful for society as a whole, which included both physical traits (mostly general health and fitness) as well as personality traits (discipline, industriousness, obedience, etc)
in modern society, a habitual criminal like jeremy meeks is rewarded for having a pretty face.
in nazi society, he would have been executed or sent to a labor camp for life. they did not tolerate antisocial behavior at all.
the super important part about nazi eugenics (and the part that most people overlook) is that it does not just affect the genetic/evolutionary level, but also has a HUGE impact on the social level. by selecting for a set of traits that are beneficial for society, all men in society are highly incentivized to display and live by these traits, because thats how they get a girl.
if you were in nazi germany and wanted to get a girl, you would not spend years on useless looksmaxxing shit and cosmetic surgery. instead you would get your life in order and get in a position where you can reliably provide for a family, because that's what girls are chasing after.
the system was extremely successful, and much of germany's rapid post-war recovery was due to the lasting effects that it produced.
what we are seeing now in the modern west is the exact opposite, and the effects will be catastrophically bad and long-lasting.