The German American Bund, or German American Federation, was an American Nazi organization established in 1936. "...the zenith of the Bund's activities was the rally at Madison Square Garden in New York City on February 20, 1939... which some 20,000 people attended.
German American Bund - Wikipedia
More than twenty thousand attend a meeting of the German American Bund, which included banners such as “Stop Jewish Domination of Christian Americans”. Madison Square Garden, 1939.