Bernie is like an awesome band like the Stones that you listen to, support, and love - except the band has a fanbase that operates like Ariana Grande's hyper-defensive teenage girl twitter militia. It almost makes you question the band because all the most fanatical followers suck so bad.
Sorry, but I'm still purging 2016 resentment toward the Bernie people who allegedly cared about progressive values so much that they stayed home on election day or voted Jill Stein. I get the distrust of Hillary/the establishment and that resentment. I sympathize. But anyone who didn't vote in the general because Bernie wasn't the D candidate can get fucked.
I learned my lesson when I voted for Ralph Nader at age 18. I was told there was essentially "no difference" between Bush and Gore. They were both beholden to corporate interests and two sides of the same coin. Voting for a third party candidate was the only way to really send a message that the two party system wasn't working. The democrats simply did not offer a meaningful alternative to republicans. I heard all of the rationales. I voted in Texas, so my vote made no difference, but Nader likely spoiled that fucking election. And think of how insanely consequential that election became post-911. Iraq, massive deficits, US (then worldwide) economic collapse. So unless Al Gore would have gone to war with Iraq while cutting taxes, increasing spending, and deregulating banks and financial institutions, there did seem to be a difference. This "lesser of two evils" thing turned out to be a game I needed to get used to playing. Maybe it's not wise to throw one's vote into a paper shredder just to "make a point."
If Bernie gets the nomination, I will be fucking first in line to vote for him even though "Bernie or Bust" people make me ragey. I just don't get these people. No matter how liberal or bona fide you insist you are, anyone who would actively make a decision that politically benefits Donald Trump might as well be Sean Hannity in my book. Worse than useless. To repurpose a phrase from the alt-right: fuck your feelings.