When people wave Nazi flags, chant Nazi slogans, perform Nazi salutes, etc. it is not unreasonable to call them Nazis.
Historically, all this folklore was a mean to an end. But the end came first. There was a plan to overthrow the government, a failed coup d'état, an relatable ideology, a strong, trained and motivated leadership, a propaganda, active enrollments and daily militia marching. In two words, actual politics.
Given their complete lack of all these, it seems to me very hasty and politically motivated to call these morons Nazis. Instead of dealing with these people for what there are - lunatics, it creates a fear for something that simply does not exists.