There is something very basic here. They yell, they scream as if their very life depends on the outcome of an election, or the confirmation of a Supreme Court Justice, or even a joke they find somehow offensive.
It is only the media that gives these sort of people a platform. They are the truly disturbed amongst us. When they go off, the cameras are there as if their actions should somehow be treated seriously, instead of the ravings of people who have no control, and nothing other than rage over what their own lives, by their own actions, have become.
Parkland High School Boy comes to mind.