There are many differences between the nazis and the progressive communists. But the way they created cadres in many many niches, the holocausts perpetrated on the unborn and more recently the elderly, the racism, the thuggery... they’re probably more alike than different.
But they have no discipline, no militarism. They would probably be very easy to beat by any organized military unit.
If you have listened to Obama, he would like to create a paramilitary force. That he said, “would be as well equiped as our military.” In my opinion that makes them on par with the Nazi’s.