 During a 1938 trip to Europe, Hoover met with Adolf Hitler and stayed at Hermann Göring's hunting lodge.He expressed dismay at the persecution of Jews in Germany and believed that Hitler was mad, but did not present a threat to the U.S.Instead, Hoover believed that Roosevelt posed the biggest threat to peace, holding that Roosevelt's policies provoked Japan and discouraged France and the United Kingdom from reaching an "accommodation" with Germany.