I'm finding Trotsky's Their Morals and Ours eerily relevant to our current crop of liberal moralists:

If an ignorant peasant or shopkeeper, understanding neither the origin nor the sense of the struggle between the proletariat and the bourgeoisie, discovers himself between the two fires, he will consider both belligerent camps with equal hatred. And who are all these democratic moralists? Ideologists of intermediary layers who have fallen, or are in fear of falling between the two fires. The chief traits of the prophets of this type are alienism to great historical movements, a hardened conservative mentality, smug narrowness, and a most primitive political cowardice. More than anything moralists wish that history should leave them in peace with their petty books, little magazines, subscribers, common sense, and moral copy books. But history does not leave them in peace. It cuffs them now from the left, now from the right. Clearly – revolution and reaction, Czarism and Bolshevism, communism and fascism, Stalinism and Trotskyism – are all twins. Whoever doubts this may feel the symmetrical skull bumps upon both the right and left sides of these very moralists.