In my open letter to Mr. Tom Doherty of Tor, I mentioned having fought against real neo-Nazis (as opposed to chimerical 'neo-Nazis', a label often misapplied to many supporters of the Puppies side of the Hugo Awards debate). I was referring to the Afrikaner Weerstandsbeweging (AWB, meaning 'Afrikaner Resistance Movement'), which was one of the hard-right-wing resistance movements attempting to derail the democratization of South Africa and the turning over of power to a government elected by all the people of that country (not just whites).
The AWB was thuggish, violent and crude. Its members murdered more than a few Black people whenever they thought they could get away with it. Its thuggery went on public display when it occupied the World Trade Center in Kempton Park in 1993, where the talks to implement democracy were taking place. On the other hand, when its members came up against determined resistance, they tended to be shocked and horrified that anyone would dare oppose them. It was beyond their comprehension that others would not be afraid of them. In particular, when the AWB tried to invade the 'homeland' of Bophutatswana in 1994 to prevent its reincorporation into South Africa, they ran into armed opposition and had to flee ignominiously, leaving several of their number dead. Read the accounts at the link for more information. It was a shambles.
Here's a documentary about how the AWB tried a last-ditch effort to derail democracy in South Africa, including film of the incidents mentioned above. If you want to see extreme right-wing desperation and Nazi thuggery in action, it's worth watching. WARNING: You will see men and women be injured. Some will die. It's not pretty . . . but nothing in South Africa was, in those days.
Thankfully, the AWB failed. I'm glad to have had a hand in helping to thwart it.