I don't think everyone who is supporting Bernie over Hillary is a skinny-jeans wearing, unemployed hipster who cries because people make fun of their face piercings. But I do think the majority of his supporters worship at the foot of government & they see Hillary as a terribly corrupt & distrustful entity who has been using them for decades to advance her own interests, which are mainly attainable through America's political structure. He's rising because against her, he is Bizarro-Hillary.
But Trump's rise isn't against one person, it's against every other mo-fo on the stage (with the exception of Carson) who have railed against, but ultimately supported, the left in this country. I don't think everyone supporting Trump agrees with him. I would be shocked if those supporting him even agree with him 50%. But he's the best way voters on the right have to show their anger with the party. The left showing up & getting into these violent & insane protests at his speeches doesn't hurt him. And the more they happen, the more free press he gets out of it. His supporters are pissed at the GOP right now - they're not fans of Hillary but she's not the target at the moment. If it gets to the point he can focus solely on her, expect him to get even more free press cause it's gonna be a shitshow.
The GOP establishment seems to be treating Trump as a school yard bully who happened to find a sport coat. They don't give a shit why the other kids are drawn to him, they figure he's a once-every- 30 year problem & they just want him to go away.