There are six attributes that classify a Nazi: Sympathy for dictatorships, nationalism, defending/belittling/glorification of Nazi Germany, antisemitism, xenophobia, and the belief in social Darwinism.
Far right activists might be nationalists, but most of them are rather patriotic. Some of them are xenophobic, but most of them aren’t. So in conclusion, far right activists are either low level Nazis or not Nazis at all.