While Madison Square Garden had prepared itself for the German Bund, many around New York City considered the Nazi sect less welcome in their city. About 100,000 anti-Nazi protesters gathered around the arena in protest of the Bund, carrying signs stating "Smash Anti-Semitism" and "Drive the Nazis Out of New York".[6] A total of three attempts were made to break the arm-linking lines of police, the first of these, a group of World War One Veterans, wrapped in Stars and Stripes, were held off by police on mounted horseback, the next, a "burly man carrying an American flag" and finally, a Trotskyist group known as the Socialist Workers Party, who like those before, had their efforts halted by police.[4]

I love that the lone burly man carrying an American flag was disruptive enough in attempting to get through the police line to warrant mention.

Many German immigrants came from the other side too, both before and after the war.

Wouldn't that make them refugees and not immigrants?