Please pause for a moment and try to refrain from thinking of me as a Nazi or white nationalist and instead lets try to take an unbiased look at the idea of eugenics.
Obviously the history of eugenics makes it look like a pretty horrendous idea, but the Hindenburg also looked like a terrible idea the moment it crashed and scorched the lives of many people. However, that failure of the Hindenburg did not stop humans from creating blimps that now function safely and properly.
Now we have far more scientific tools, such as genetic manipulation and beneficial gene identification, to make the idea of eugenics more plausible with less backlash.
For example, if government were to impose incentives for people to breed with specific partners based on genetic analysis of traits that are beneficial to society without any negative punishment for other breeding, then eugenics would not have such immediate and drastic consequences.