When the options are reduced to keeping quiet or open armed rebellion, it is only a question of how long the blocked safety valve of free speech can contain the pressure. Certainly, the first Amendment was written to protect political speech, the Founders would have considered nothing less.
Note the J6 group, unlike others who felt their 'speech' was not being heard had not reached the level of agitation, even at the peak, where people in it were burning and looting buildings and killing people.
As for J6 vs The Boston Massacre, I must also note dead minorities were under-represented on J6, in comparison, but even the Redcoats were too restrained to fire on women or bludgeon women to death, at least in that incident in Boston.