Nancy Pelosi, head of the democratic party, condemned Antifa, so is that good enough?
http://www.democraticleader.gov/newsroom/82917/
A quick search of "articles condemning antifa" brings up a number of articles condemning antifa... punch in the same search with New york times, etc if you like, they're all there.
https://www.nytimes.com/2017/08/17/us/antifa-left-wing-faction-far-right.html
So, antifa has been acknowledged as bad and denounced by the left. What does that change exactly? Charlottesville, make no mistake, was a product of the far right neo nazi's, KKK members, and other rejects/losers deciding to take advantage of a statue put up during a neo-confederate period/fake history being taken down to push their idiotic agenda. This collection of societal mouth breathers/slime than attracted another set of idiots, called antifa, to fight the first group of idiots fight. Both sides have been renounced and both are terrible and make no valid contribution to society. However, had the racists and their ilk not decided to profess their antiquated, uneducated, and sad views in a misguided attempt at changing history than antifa wouldn't have been there. Full stop.
Why, again, brings me back to why focusing on one side or the other makes any difference? Would it satisfy you if every network had an hour long "antifa is terrible" show on a weekly basis to go with a "Nazis, surprisingly, are bad too" show? Does recognizing antifa as bad somehow legitimize the right wing extremists or their cause? Who needs to come on and denounce them if Nancy Pelosi isn't good enough?