Krieger is correct here. Peaceful protest and nonviolent resistance are one thing, while violence and rebellion are another. Governments lawfully suppress the later.
But in present conditions, using violence to express resistance just feeds the ramping up of restrictions on civil liberties "in extremis" and growing the police/surveillance state. It's a strategic blunder unless one thinks that further imposition of a policy state will result in the public rising up to resist. That is most likely wishful thinking based on history. There is not much evidence to suggest it.
The media consensus, echoing the alt-right media, is already anti-antifa, and extremism on the left is being portrayed as at least equal to extremism on the right if not worse and a greater threat to America.
But, as Krueger points out, saying this will probably not change many people's minds.
Max Sawicky
The Hill — Opinion
The Hypocrisy of Antifa
Jonathan Turley | Shapiro Professor of Public Interest Law at George Washington University