American Jews on edge from the Pittsburgh temple murders and the sharp rise in anti-Semitic incidents in the United States might — or might not — want to recall an even more anxious time: the dark autumn of 1938. Then, as the Nazis began to overrun Europe and the maniacal voice of Adolf Hitler crackled over the radio, as Kristallnacht shook the world, powerful voices right here at home, of men like Father Coughlin, Henry Ford and Charles Lindbergh, railed against American Jews — immigrants and the children of immigrants — pushing the country toward war, these men claimed, to rescue their co-religionists in Europe.

All America was on edge that fall: Orson Welles’s Halloween eve radio dramatization of H.G. Wells’s “The War of the Worlds” triggered widespread panic among thousands fearing an actual alien invasion was taking place. Yet another broadcast, 10 nights later, had a very different effect.

On Nov. 10, 1938, one day after Kristallnacht and the eve of Armistice Day, the radio and recording star Kate Smith, the “Songbird of the South,” spoke the following words on her weekly CBS show: “And now it’s going to be my very great privilege to sing for you a song that’s never been sung before by anybody … It’s something more than a song — I feel it’s one of the most beautiful compositions ever written, a song that will never die. The author, Mr. Irving Berlin. The title, ‘God Bless America.’”

The reaction was swift and powerful: America loved “God Bless America.” The song quickly became omnipresent. Thousands of ordinary citizens sang it every day, in schools and churches and at all manner of public gatherings — even at least one meeting of the Daughters of the American Revolution. “When the song was played at Brooklyn’s Ebbets Field Memorial Day,” The New York Times reported, “the crowd rose and uncovered as if for the national anthem.”

A serious groundswell of support arose for “God Bless America” to replace the rangy, difficult-to-sing “Star Spangled Banner.” Irving Berlin would have none of it. “A national anthem is something that develops naturally through age, tradition, historic significance and general recognition,” he said. “We’ve got a good national anthem. You can’t have two.” ...