Most of the reports of violence and threats in Nevada seem to have come from the DNC. Video and social media reports I've seen from there shows really REALLY ticked off people - understandably so after the chair made a mockery of process. I've seen no photos or video of thrown chairs. I saw photos of police just standing in front of the stage but none of people being arrested which is what they would have done if there indeed been violence. Instead the Establishment ran things to their liking, did not follow process and then when people - rightfully got upset they point their finger and call "violence".

Also no reporting of Sanders office being broken into and ransacked and one having shots fired into it? 

Now the DNC is talking about violence in Philly while all I've seen are organizing of a march including trash bags to pick up trash along the way so that they "clean up outside" while Sanders hopefully "cleans up inside". Violence? I think some elites are getting scared.