Much is made of the fact that liberals and conservatives see racial issues differently, which they do. But these differences have too often been seen as simply those on the right being racist and those on the left not.
You can cherry-pick the evidence to reach that conclusion. But you can also cherry-pick the evidence to reach the opposite conclusion.
During the heyday of the Progressive movement in the early 20th century, people on the left were in the forefront of those promoting doctrines of innate, genetic inferiority of not only blacks but also of people from Eastern Europe and Southern Europe, as compared to people from Western Europe.
Liberals today tend to either glide over the undeniable racism of Progressive President Woodrow Wilson or else treat it as an anomaly of some sort. But racism on the left at that time was not an anomaly, either for President Wilson or for numerous other stalwarts of the Progressive movement.
An influential 1916 best-seller, “The Passing of the Great Race” — celebrating Nordic Europeans — was written by Madison Grant, a staunch activist for Progressive causes such as endangered species, municipal reform, conservation and the creation of national parks.