When in the History of the Far Right in the USA

Have the Klan and the Nazis EVER shown up for a demonstration without the intent to incite or initiate violence?
Thats the main lesson from Charlottesville...those guy show up and riots follow they are good at that sort of thing.
Allegeldy a similar "demonstration" is planned on Boston Common for the 19th, if I was Charlie Baker I'd call out the National Guard, but this is Governor Spreadsheets leadership in the face of far right provocation isn't his strong suit.
Some strong leadership now, might prevent violence later, just remember Dr. Goebbels' streetfighters made little progress in Berlin until the national and city leadership essentially fell for the Nazi Bluff and started negotiating with the NSDAP.