The Democratic Party, have a surprisingly mature start to the primary season, is about to tear itself apart. These frames aren't just angry, they are disrespectful. BernieOrBust pretends to be talking to the DNC, but a huge portion of the Sanders base including volunteers (and likely including Sanders) will be very upset if the Sanders primary plays even a small role in a Republican victory. And "Just Vote Blue" is basically saying "shut up."
What are the real messages, how could each of these movements be reframed to work?
The underlying message driving BernieOrBust is one that most Democrats used to agree on. Money interests keep ordinary people at each others' throats over social issues they don't care about, while rewriting the rules to move ever more of this countries wealth upwards. Our politics will continue to deteriorate as long as money runs rampant. Hillary Clinton has in many ways joined this: guns and abortion and other social issues keep working-class conservatives voting for the Republican side of the machine's coin, and she is stepping in to the role of representing the gun-control and choice side of that coin. We can't cave in to that machine, or the country will drift ever farther to the right and under the boot.
or I'll bust what you want
BernieOrBust advocates need to disentangle two issues. Sanders is the most honest and high-integrity candidate in this race. And the farthest left. We need to admit to ourselves: we haven't convinced the country to go this far left. We have no right to freak out that a Socialist doesn't win elections in America, or to ruin the chances of moderate-progressives whose views match the center of what America would be if it were a democracy. It is time to get angry, and many moderates and even conservatives are with us, that the machine is crushing honest people. Small doses of anger at people who vote for a candidate they know to be a machine candidate may even be in order -- but if you're angry all the time, right or not, you'll just come across as angry. Sanders movement might know it's right, but it's not going to convince more people unless there is more joy and only limited doses of anger.
because I told you
If your goal is to convince people who are new to politics to be more pragmatic and stick it out for the long run, you are asking them a big favor. You are asking them to get themselves dirty -- for young voters, you are asking them to join the muck of dirty politics for no good reason, because the other option is right in front of us.