Michel Foucault in 1976:
“In addition to the State racism that developed in the conditions I have been telling you about, a social-racism also came into being, and it did not wait for the formation of socialist States before making its appearance. Socialism was a racism from the outset, even in the nineteenth century. No matter whether it is Fourier at the beginning of the century or the anarchists at the end of it, you will always find a racist component in socialism.
“I find this very difficult to talk about. …”
Source: Michel Foucault, Society Must Be Defended, LECTURES AT THE COLLEGE DE FRANCE, 1975-76. Edited by Mauro Bertani and Alessandro Fontana. p. 261. (Reminder via Kevin Hill.)
Related: How the collectivisms combined with skepticisms to generate postmodernism.