Eugenics was an idea pondered by the ancient Greeks. I’m not defending it, but it’s not the brainchild of a certain genocidal political party that many people seem to think it is.
No - it's pseudo moral. It's reviled because proponents are reliably racist idiots who don't even understand the limits of the science - or why breeding humans like farm animals really isn't such a great idea.
The GP didn't seem to claim it was moral. Making nerve gas isn't moral either, but that has nothing to do with whether making nerve gas is pseudochemistry.
> It's reviled because proponents are reliably racist idiots
It's reviled because it's inherently immoral. Its proponents are indeed usually racist idiots, but even if they had the best of intentions, it would still be immoral.