I just read a very profound statement from historian and author John M. Barry:
I think thats just as true of the Klan of the 1920s as it is of the newly crowned "progressives" (vice "liberals") of today.
American populism has always been a complex phenomenon containing an ugly element, an element of exclusivity and divisiveness. It has always had an "us" against a "them". The "them" often included not only an enemy above but also an enemy below. The enemy above was whoever was viewed as the boss, whether a man like Percy, or a Wall Street, or Jews, or Washington; in the 1920s the enemy below was Catholics, immigrants, blacks, and political radicals. - Rising Tide, p. 154.