Those aren't the only people being labeled. Plain Trump supporters get called that. Black people ho support Trump or Latinos supporting trump's immigration policies are getting lumped into the same group. It's really unfortunate because it's as if anyone who doesn't agree with their world view is a nazi.
It's unfortunate because people in the middle, who will now get skewered for being fence sitters will be more likely to vote against the antifa types who are trying really hard to antagonize.
You're going to have to narrow it down - Olbermann's Twitter feed is full of videos I'm not going to wade through. A search doesn't find any evidence of calling "Plain Trump supporters" Nazis - I mean, he's definitely calling people who support and excuse Nazis Nazis but I think that's a reasonable stance, no?
It's unfortunate because people in the middle, who will now get skewered for being fence sitters will be more likely to vote against the antifa types who are trying really hard to antagonize.