He's not allowed to have an opinion now? He can't force her to do anything.
EXACTLY!
Going around and saying that people should stay home or vote for Trump, or lying about her record, or trying to get the superdelegates to flip is one thing, and I disagree with all of those approaches (to be fair, he hasn't really taken any of them and I doubt he will, and any suggestions that he would are just posturing).
Simply trying to speak out to the powerful and get them to act on something he believes is right? I don't see what's so offensive about that. You're allowed to disagree with his vision and push back hard against him and make an opposing case, but criticizing him for speaking and using his voice to twist Hillary's arm for something he genuinely believes in is just dumb IMO.
A much better thread title would be "Bernie advising Hillary to make stupid VP far left picks that are too extreme IMO/will hurt the Democrats chances at election," if that's how you genuinely feel.