Indeed, I have posted about this article some years ago, I remember the picture,(see below).

Yes, the German prisoners of war held in the United States were frequently granted public access, mobility, and consumer privileges denied to Black American servicemen under Jim Crow laws. Yet the most interesting part which we have profoundly discussed at the time being was how White Americans were "infuriated" when they learned German POWs and Black American laborers often formed surprisingly harmonious, localized relationships while working side-by-side in agriculture and low-paid details.

Kris couldn't stand seeing this in his face, seeing some blue eyed blond ppl getting along with Negroes. Kris cannot "breathe" without seeing one group hating on another group. The motherfuuucker divided the world into "us" and "them", which can lead to fear, unfair treatment, and hostility toward outsiders.