“Today, we are all rightly repulsed by the sight of neo-Nazis and Klansmen openly marching in Charlottesville, VA, and we are horrified by houses of worship being shot up by right-wing terrorists. But on February 20, 1939, over 20,000 Nazis held a mass rally—not in Berlin, not in Rome, but in Madison Square Garden, in front of a 30-foot-tall banner of George Washington—bordered with swastikas—in New York City.”