Slightly tangential, but I'm pretty sure eugenicists were never thought of in the same way as communists et al. In the US, eugenics was an important idea in the Progressive Era of the late nineteenth/early twentieth century, and while it wasn't universally liked (the Catholic church being a notable opponent), it did have broad social approval and at least a few countries practiced eugenics in some form. This all changed with Hitler and World War II, and now eugenics is another idea sidelined to the dustbin of history. (For now?)

As Wikipedia says: "At its peak of popularity, eugenics was supported by a wide variety of prominent people, including Winston Churchill, Margaret Sanger, Marie Stopes, H. G. Wells, Norman Haire, Havelock Ellis, Theodore Roosevelt, George Bernard Shaw, John Maynard Keynes, John Harvey Kellogg, Linus Pauling and Sidney Webb. Its most infamous proponent and practitioner was, however, Adolf Hitler who praised and incorporated eugenic ideas in Mein Kampf and emulated Eugenic legislation for the sterilization of "defectives" that had been pioneered in the United States." — https://en.wikipedia.org/wiki/Eugenics#Supporters_and_critic...