Caitlin Johnstone on those mean Bernie Bros

She nails it so I'll let her tell it:

"The primary reason the establishment narrative managers are becoming increasingly shrill about the online behavior of Sanders supporters runs much deeper: they’re afraid of it because it’s effective. [...] And that’s the real reason the imperial narrative managers are so freaked out about it. Not because anyone is being 'viciously attacked', but because they understand that narrative control is power. The people collectively seizing control of the dominant narratives within the empire is the stuff of oligarchic nightmares, because whoever controls the narrative controls the world. Power is the ability to control what happens. Absolute power is controlling what people think about what happens. Humans are story-oriented creatures, so if you can control the stories that the humans are telling about what’s going on, you can control those humans. Any adept manipulator understands this. So they understand that the people taking control of dominant narratives is a direct threat to their rule."