Bernie promises,they all cheer. not one of them has any idea WTF they are cheering for.
They are cheering for increased taxes , more government, and more debt.
I think that's just the way things like campaign rallies and town hall meetings work.
I saw someone post something along the lines of "Bernie promised to invest $10 Trillion in our infrastructure and the crowd cheered. They don't know where that money will come from". While true, I think the same response would happen if Trump said he'd invest Trillions into our infrastructure. Who doesn't like roads and bridges!?
The people that go to these things obviously have a liking of their respective candidate and will clap and cheer for any half-wit idea they come up with. I also think that's why they do say the most outlandish things without thinking twice. As a candidate, if all you ever get is cheer and applause for your idea, no matter how bad, you'll always think your idea is good, and that people love it. Because it's all you see.