I also agree that both parties are big tents. But I will continue to argue that the democrats were and are still the more racist party: https://nypost.com/2016/03/21/the-progressive-movements-horr...

"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 Wilson or for numerous other stalwarts of the Progressive movement."