How does the author address indoctrination in the novel, Hard to Be a God?

The indoctrination at the Patriotic School of Arkanar is a barb aimed at the Soviet system, echoing Lenin who insisted (rightly so) that you can cast any mind into any mold you like, providing you start early enough. But once again the authors aim beyond the immediacy of their Soviet era. Lurking behind the lawless youth gangs is the shadow of Nazi Germany's Hitlerjugen who, graduated with equal dogmatism and nationalistic pride, were the future cadres of the SS, SD, and other branches of Hitler's apparatus of control. "And outside the window—stomp, stomp, stomp—come marching along the nailed boots of the sturdy, red-nosed fellows in their gray shirts." The gray of the Sturmoviks, the Storm Troops of the toxic Don Reba, signifies not only the shabby mediocrity of the middle class conformists, but alludes both to Mussolini's Brown Shirts—their color forever synonymous with fascism—and the crow-black uniforms of Hitler's Waffen-SS. Not content with drawing parallels, the authors collapse the underlying identity of Earth and the alien planet with a stark reference to Don Reba taking the path of "Captain Ernst Rohm of Nazi fame."