I realize the decades difference, but it was the FBI/DoJ that went after the KKK with infiltration, disruptions, and arrests...I believe they have done the same with other "radical" organizations (Michigan Militia, Idaho, Hancock NY, et.al) and I'd bet they have undercover already hard at work within ANTIFA...Now, while I do not support them, they still have Constitutional Rights that must be observed up to the point where they cross the lines, then, well then, you're fucked.Trump said it but it's up to the FBI to actually do something about that nasty group. The problem is the FBI is protecting them. As Sundance at the site the conservative tree house has written the FBI could have cracked down hard on antifa years ago but never has. After a certain period the lack of prosecution means antifa is being protected. The FBI is the enforcement arm of the deep state. They allow antifa to operate because they do things the FBI can't openly do.