Can't say I fully disagree or agree with either of these points after some of the things I've seen in the last few years this being one of them:
Alabama deputy gets 3 years in prison for lying under oath ...not sure that saga ever got much attention (took the murder of a vocal critic who had non-trivial local ties before it even got much attention locally).
Short version of the events are off-duty deputy got in (tarted?) a bar fight (due to looks/comment about the woman he was there with) with a local handyman, deputy got his back-sided whooped and then pressured other department personnel into providing information about the handyman, after which he (and other officers - some unknowingly) pulled over and beat the handyman to the point of hospitalization. One of the handyman's customer's learned what happened, starting making a lot of noise .....and was then found dead with a small caliber bullet hole in the back of his head. .....which is what finally started getting attention from other authorities.
So yes, I agree cops are human .....and sometimes you get some bad ones, and sometimes you also get what you pay for as not all places have stringent hiring requirements for law enforcement (and the pay is commensurate with that low requirement). Of course the firearm training/currency requirements are also pretty weak (I would go so far as to wager there are a fair number of here who fire more actual rounds annually and could probably pass the annual marksmanship requirements for many law enforcement agencies). Of course, since law enforcement's primary duty isn't to engage in gunfights that level of training isn't something the public (as a whole) seemingly wants to fund.
Incidentally a comment about US history at one point (early after the founding) militia service was required in the US and all militia members were also required to supply their own firearms. That eventually went away due to the population forcing the issue by showing up with cornstalks, broomsticks, etc. in place of firearms. Which is potentially one example of the early breaking down of society and the ignoring/disregard of civic duties.
Ultimately for any society to exist, it's members must want it to exist and be willing to take part in making it happen - whether that be through direct involvement, or even the simple indirect involvement of obeying the duly enacted laws. Anything else is likely to lead to anarchy (if not immediately, then potentially after passing through a stage of tyranny). The things that aren't taught in history and civics classes (or that get forgotten) is bordering on shameful.
Which highlights the point that children (who eventually grow into adults - potentially without actually becoming adults) may only learn what they are taught (unless they are successfully taught to learn for themselves) ....and if that teaching is horrible. ....well, then it shouldn't be much of a surprise we're seeing what we're seeing -- particularly when nearly every child will be shown/taught violence, but not all will be taught to value life (or even to think about something other than their own needs).