They're not mad, they're sore winners. They're rubbing the Bernie supporters' faces in the dirt and calling them the politically-correct equivalent of cucks. They act like they own you if you're a lesser-evilist who actively despises said lesser evil. And you know what? They're basically right. Lifelong harm-reductionist Dem voters are fucking losers for letting themselves be held hostage like this when escape is as simple as no longer giving a shit whether Red Team or Blue Team wins and voting for independent third party socialist candidates when possible.