Idiots? Absolutely. And their votes are certainly endorsements of Trumps racism. There no two ways about it.
But there's a wide nuance here. And to simply yell "They're all NAZIS!" I mean, how the hell can you hold up a brush that large?
For the people I know they would agree that America has a race issue, but they are in their own little worlds and they don't care. It is truly "I got mine so fuck you." They have a few extra dollars in their paycheck "thanks to Trump!" so they are happy. They don't get how the tax cuts are bad, how all of the policies being enacted are racist, etc. It is racist by proxy but calling them Nazis is extreme fuels the right. By lumping them all together they can easily say "look out extreme the left is!" and their base eats it up, driving them farther right.
The guy in the OP is a Nazi. Some dude who is ignorant of what is going on it not the same. For the people lumping them together they are not helping.
Ignorance is not a shield. It's bliss, but does not protect you from consequences.
White Supremacy is the DNA of this country and has plagued us till this very day. It's about White Men controlling the social structure and destiny of this country through power, control, and violence. Nowadays, White Supremacy has morphed into an idea of wanting a white enthostate. In essence, purging the country of all races except for white people and reclaiming the country as their right full homeland.
Nazism takes all those qualities and morphs it into a facist military force, However, both use violence. Nazism is just more organized.
The labeling doesn't matter one bit. If we have to wait until actual Nazis show up, it's way too goddamn late by that point. You don't want the actual Nazi term to be accurate because words would be utterly useless at that moment.
Republicans buy in wholesale on their propaganda machine but we have to lay off the extreme labeling? I'm Black, so I'm lazy, stupid, mooch off government and want everything done for me. They have no problem believing that lie as truth. Anything I do will "entrench them farther right", that's how the propaganda works.
Labeling isn't the issue. It's those who think they aren't a part of factions because they don't wear the uniform but actively contribute to the donation box. You aren't absolved because you ain't marching. You are just as culpable propping up the force whether that's passively or through ineptitude and a general neutrality against oppressive forces.