Looks like we’ll have to wait and see if they were justified by him initiating violence or charging towards them brandishing his fists ...or if they were violating the idiot mall-goer’s mere use of speech rights.
He does have a right to express his opinion about Trump, though I would think he had to get fairly close to them to be heard, and since he was using obscenities, I would take a “Borkian” view that the use of obscenities is threatening. If he approached a family while he was shouting obscenities how could it not be interpreted as threatening?
I think Bork was right about civility. The lack of civility is destructive to those very rights of free speech that obscene people like to tout.
If he hadn’t used obscenities, it would be easier to sympathize with him. Th more often someone being uncivil gets it in the kisser, the sooner we can return to civil discourse and debate rather than raw emotionalism.