I spoke earlier about this ambiguity, which requires us, as a society, to look at things that are acceptable and unacceptable.
I would say that in normal times, when society isn't as polarized as it appears to be at present, what happens is we have voices that are extreme existing on the fringes of the Internet. These folks used to meet in areas that were private, but they have now mainstreamed their violence. The truth is that public discourse is now mixed with a whole bunch of violent, extremist rhetoric, and it is difficult for some more vulnerable members of our society to truly understand what is being said to them and who, in their view, is responsible for their grievances.
The ambiguity and the mainstreaming of violence are the problem in question.