Good question. Just guessing here but said people might be concerned that ANTIFA's violent behavior might be brushed aside or ignored because of the OMG NAZI's narrative. It seems like The ANTIFA side are ready to label anyone who doesn't agree with them as Nazi's and Supremacists. Like Charles Barkley being labeled a 'Black, White supremacist' because he was condemning the violence form both sides. Meanwhile ,the media is giving anyone who hates Trump a free pass it seems.
What's troubling about ANTIFA is a lot of them don't even seem to realize what their doing is wrong. being the media is supporting them, I guess it's hard to blame them. Anyhow look at Eric Clanton. He's the San Francisco Bay area college philosophy teacher and ANTIFA activist who was charged smashing people in the head with a bike lock. I'm trying to find an article I read a few days ago but he's now basically crying about how "the right" ruined his life for uncovering his identity which lead to him being charged. No sense of responsibility there.
Another guess here but since Trump has been elected I'm guessing, as I've said before, more people of colour have been assaulted by left-wingers than they have by loser neo-nazi's. That's not to say the Neo-Nazi's are anything but despicable but the media is clearly trying to gloss over what the left is doing.
I'm a white dude so I've never known or felt racism so I'm missing whatever stress and anxiety people of colour feel for being attacked verbally or physically) because of their race- which is the Neo-Nazi raison d'etre. ANTIFA will just as quickly attack a black person for wearing a red hat that says MAGA. I a core physical level I don't see much difference between Neo-Nazi's and ANTIFA except one has the support of the media and is, or is becoming, more physically violent.