as gullible and dumb as most of the population is, Uncle Sam hardly has "tremendous credibility with most of them."
Sure he does. You think people don't worship federal law enforcement? Look at the coverage of, say, the Boston bombing; the media and the general public were all lining up to praise any officer who was involved in that situation. Same with Sandy Hook, same with "sabu" and Anonymous, same with every story that gets publicized.
Police abuses are currently part of the national dialogue thanks to what happened in Ferguson, MO. But it took that event, a racially charged shooting, to get national attention and wake people up. Eric Garner being choked to death by NYPD didn't really get much press. The poor child who was disfigured by a SWAT flash-bang in Georgia didn't really get much press. It's just now coming out today that LAPD left an asthmatic man to die while he begged for help, that was almost a year ago and didn't get much press.
The population adores the federal government. The population thinks the NSA spying is all well and good and that Snowden is a traitor.
Congress has one of the lowest approval ratings in history, and yet incumbents continue to be re-elected over and over. Yes, the population is surely gullible and dumb, but to say that Uncle Sam hardly has credibility with them is a farce. The people love their Uncle.