This is an opinion piece by Kurt Eichenwald of Newsweek. He recognizes that Sanders supporters have crossed the line when it comes to civil discourse in politics
Violence. Death threats. Vile, misogynistic names screamed at women. Rage. Hatred. Menacing, anonymous phone calls to homes and offices. Public officials whisked offstage by security agents frightened of the growing mob. None of this has any place in a political campaign. And the candidate who has been tolerating this obscene behavior among his supporters is showing himself to be unfit for office.
After discussing some of the behavior of Sanders supporters throughout the campaign, he goes on to address Sanders’ unwillingness to address his unruly supporters
Meanwhile, Sanders reacts with mealy-mouthed mumbles, saying he doesn’t support violence while doing literally nothing about it and claiming that—contrary to the statements of witnesses, reporters and video recordings—his violent supporters aren’t violent. Trump would be proud of the disingenuous delusions vomited up by the candidate.
He ends the piece pointing out the Bernie or Busters, and how they have the potential to throw this election to the Republicans
Your supporters are now, in true petulant child fashion, proclaiming that they will vote for Trump rather than Clinton because blah blah blah, Wall Street, blah blah blah, corporate contributors, blah blah blah, establishment, blah blah blah
Lots more opinion in the article.