In January 1934, Lord Harold Rothermere, the owner of Britain’s Daily Mail, filed a story from Munich praising Adolf Hitler. The article was published when Jews were being ousted from public life in Germany and the Nazi party had already established a large network of concentration camps across the country. Rothermere assured his readers that stories of these atrocities were wildly exaggerated. The restaurants and hotels in Munich were bustling with German Jews during the festive season, and none “showed [any] symptoms of insecurity or suffering,” the British newspaper proprietor wrote. This was typical of the pro-Nazi line Britain’s Daily...