True socialists cannot at the same time be nationalists, militarists, and capitalist ‘patriots.’ They are either one or the other; they cannot be both. The self-called socialists who are nationalists first and who set the ‘fatherland’ of their masters above the whole earth and above all the workers of the world are not socialists at all but either mild and harmless capitalist reformers and stool pigeons or traitors to the cause.

— Eugene V. Debs, National Rip-Saw (1916)