Field-Marshal Wilhelm Keitel gave an order on 12 September 1941 which declared: "the struggle against Bolshevism demands ruthless and energetic, rigorous action above all against the Jews, the main carriers of Bolshevism.
Nazi propaganda presented Barbarossa as an ideological-racial war between German National Socialism and "Judeo-Bolshevism", dehumanising the Soviet enemy as a force of Slavic Untermensch (sub-humans) and "Asiatic" savages engaging in "barbaric Asiatic fighting methods" commanded by evil Jewish commissars whom German troops were to grant no mercy.