As long as I'm crediting liberals for behaving well at the many, many protests against anti-union legislation in the states, I should point out the video conservatives are collecting of liberals behaving badly. The newest one , from Michael Simkins at a March 8 rally in Ohio:
VIOLENCE RATING: 1/10. He does threaten to break the videographer's neck, but then he doesn't. His only physical reactions are a head-bump into the camera and a flashing of the middle finger.