“In 1941, Jews throughout the Third Reich were forced to wear a yellow Star of David. That same year, the first gassing experiments were conducted at Auschwitz and 33,771 Jews were killed by Germans and Ukrainians at Babi Yar outside Kiev. At the beginning of the war, the U.S. media rarely reported on or even knew about these horrific events, but word of Jewish suffering at the hands of Nazis trickled down to Kirby, Simon, and other Diaspora Jews in the form of wrenching letters from relatives trapped in the old country. Simon and Kirby used Captain America to strike back and boost American morale while proudly alluding to their religious faith. In a later issue, Steve Rogers watches newsreels depicting Nazi atrocities — newsreels Kirby and Simon surely must have watched as well. Captain America’s weapon of choice was a strange one — not a machine gun, but a shield. The shield is a famous Jewish symbol, the Magen David, which means the “Shield of David.” (It’s also known as the “Star of David” because the Magen David is a hexagram.) The term “shield” in Jewish prayer denotes the closeness and protection of God. In a sad twist of fate, Captain America’s costume featured a star at the same time that Simon and Kirby’s European brethren were being forced to wear a star of a very different kind.”
— Simcha Weinstein, Up, Up, and Oy Vey! How Jewish History, Culture, and Values Shaped the Comic Book Superhero (x)