While i am against the violence advocated by some of the loosely-knit group known as Antifa i also understand (though not in any way from an expert's historical perspective) where they are coming from.
Bottom line, do people as conix stand against the Trump-friendly ultra-patriotic white nationalist groups? Or not? By using the violence arising from ultra-right versus Antifa clashes to make blanket condemnation of all of the disparate groups of Antifa, and by ignoring all the other activities Antifa people do (like encouraging people to join unions) conix and her ilk give sympathy to Trump's racist buddies. Something like that anyway.
It was Plato who said, “He, O men, is the wisest, who like Socrates, knows that his wisdom is in truth worth nothing”