It was billed as the March of the Red Shirts. On a motorway overpass, on the edge of Orlando, there was a gathering of around 50 neo-Nazis. They were members of two antisemitic, white nationalist groups - Blood Tribe and the Goyim Defense League. Those present, all male, were dressed in red and black and most had their faces covered. They gave the Nazi salute, chanted anti-Jewish slurs and waved swastika flags at passing motorists. Earlier in the day, around 15 members of a different neo-Nazi group - The Order of the Black Sun - had gathered outside Orlando's Walt...