Not sure what the angle here is, but Antifa aren't peaceful at all. They're instigating panic, fear and chaos. They're also largely young, white males who apparently have nothing better to do.
Just because Benny Johnson of all people says that guy identified with antifa doesn't make it so.
Also there seems to be a lot of confusion about what antifa is, and what it means to be part of that movement.
First off there's no "organization" to antifa, there are hundreds of individual groups that employ their tactics to varying degrees and employ direct action under that banner. That said, probably the most defining characteristic of the movement is that they are willing to employ violent tactics to oppose fascism, think punching Nazis in the face for example, although many chapters only condone such violence in self defense.
Another thing to keep in mind is that anarchy isn't the driving force behind the movement, they are two separate things with some cross pollination.
One thing that the last few days have made me think about is how different these protests and riots are from "race riots" we've seen in the past. The groups of people we're seeing are a lot more diverse than they used to be. While I think most of the people out there are protesting injustice at the hands of police towards minorities, I think in many ways it's becoming a movement against police violence as a whole, and the police state the US has become.
The escalation in use of force by police, not just against protestors, but even the press and standers-by, is helping to move things in this direction as well imo.