It’s a bird, it’s a plane, it’s some “pleasant” American guy in “red shorts!” In the comics, Superman would even go on to attack the West Wall in those very same shorts. The Nazis were somewhat bemused that an American would even dare try and breach the Siegfried Line, arrogantly assuming it would take a superhuman effort to do so. The Nazis, who considered themselves the Ubermensch of Europe in the 1930s and 40s, must have been somewhat weary upon learning of a new American comic book superhero who seemed more Aryan in theory, and thus like themselves, than a typical American.
The Nazis came to despise Superman, the comic hero created in 1939 by Cleveland native Jerry Siegel. And yes, you probably wouldn’t be wrong at all in assuming Mr. Siegel’s being Jewish had something to do with the extreme dislike the Nazis had for Siegel and his All-American cartoon creation.
The SS simply didn’t like competition. For them, there could only be one race of Supermen on the planet, and some super strong American wearing a cape, who flew around and saved people’s lives instead of snuffing them out wasn’t going to steal the Schutzstaffel’s thunder! Just the fact that these goose-stepping morons were getting worked up enough to devote an entire article in their newspaper concerning a fictional character tells you everything you need to know about Aryan insecurities.
The link below will take you to the April 25, 1940 article taken from Das Schwarze Korps, or The Black Corps, the official newspaper of the SS. Curiously, the US was not yet even at war with the Axis Powers, and wouldn’t be for almost another twenty months.
http://research.calvin.edu/german-propaganda-archive/superman.htm
Superman would of course outlive the Nazis and Waffen-SS that he helped beat up, depose, and detain in the fictional world at war. He helped bring Hitler, Mussolini, and Tojo to be held accountable for their crimes against humanity, ensuring that truth, justice, and the American way survived. Superman was the polar opposite of the Nazis. In fact, the SS were more akin to Bizarro Superman than anything. But it sure was nice of them to worry about the minds of young Americans, whom they felt would be “poisoned” by an iconoclastic character who’s creator just happened to be their kryptonite-Jewish.