Certainly World War II had some influence on this.
When someone says eugenics, many people automatically think of some sadistic things.
The Nazis did very bad PR for many things. Eugenics is one of them.
Pity.
However, it is not only their fault. I think that even without them, eugenics would not be popular.
There would probably just be less negative feedback.
This is simply a controversial topic.
For example, there are people who are opponents of eugenics due to religion.
They believe that the human species should not play God.
I have a completely different opinion.
Our species must play God if it wants to survive.
I fully support eugenics, even despite previous events.
I don't see anything immoral about it.
I hope that eugenics will become more widespread in the future.