Have you ever sat on a jury in a criminal case? A frighteningly high percentage of people will swallow every lie a cop tells, even when thoroughly discredited in cross-examination. There's no shortage of people to guard the concentration camps.

I've been on a grand jury... the cops lied through their teeth, couldn't keep their stories straight through a prepared monologues reading from notes and ... everyone in the room picked up on it and didn't indict the suspects. Our grand jury was so cynical the DAs stopped giving us cases and made the other two grand juries stay late to make up for the lost capacity. It was great. We did something good. And it was just a bunch of random people from Brooklyn.

The establishment likes to pat the establishment on the back but ordinary people seem to know what's up. In my minimal experience, anyway.

(One thing to keep in mind... grand juries really are a cross-section of the population, whereas lawyers get to select jurors after talking to them, so there is some selection bias on ordinary juries that grand juries don't have.)