So, the person claiming to be an admin really is an admin, so I won't call him a troll anymore, but I do think he is grievously misinformed and/or kidding himself about life in the US and how our police forces behave towards citizens. It has been escalating for 11 years since 9/11. I also don't get why this one thread is singled out to back up its POV with stats and science, where other more ridiculous claims like "Depression is 100% a choice" get let slide in the non-anon forums, but that's neither here nor there.
This is why militaries are typically not employed in civilian populous, and when they are, it turns very ugly, very quickly.
It already has, and I can only assume you don't live in the US if you think that. (See: War on Terror, War on Drugs.) We have a LOT of militarized police response since 9/11, for everything from legitiamate bomb threats to peaceful protests, and the amount in which the actual military has been used in civilian settings is also on the rise. This is not news to anyone who lives here.
Police don't start beating a protester because they're sitting around. No doubt it has happened, as some absolute insignificant minority, which people grab and confuse as normal.
If this was a domestic abuser situation where a husband "only" beats his wife once a month, we wouldn't let that slide - if we knew about it, which oftentimes we don't. Yet only a tiny fraction of the police brutality is ever answered with any kind of real consequences. Most is swept under the rug, charges not filed, and can't be accounted for, because much like domestic abuse or rape, it's hard to make it stick, there's lots of victim-blaming, and there are many barriers to people speaking up. Again, not news to anyone who lives here.
I hear about some new uncalled for police abuse that results in grievous injury or death at least two or three times every month, and I hardly ever hear of any consequence for the police involved. Oakland Occupy - A marine shot in the face with a tear gas canister. New York Occupy - Tony Bologna spraying women in the face with pepper spray while they were penned in by the NYPD. The UC Davis pepper spray incident. Oscar Grant, shot in the back while handcuffed face down on a BART station floor. Kelly Thomas, beaten to death as he pleaded with the officers to stop. Sean Bell, gunned down on his weddding day. Amadou Diallo, shot 19 times out of 41 bullers. Anaheim PD this summer. The Alabama guy who after being frisked, searched, and handcuffed, reportedly "killed himself" in the back of a squad car. The people who are killed in no-knock drug raids, some of whom didn't even have drugs or weapons (google and you will find). People who are killed before the police identify themselves, as happened to an unarmed guy in my city last year. (He was holding a garden hose spray attachment, they claimed it looked like a gun but didn't give him a chance to disarm himself. No charges were filed against the cops who gunned him down. The list goes on. And on. And on. Again, not news to anyone who lives here and pays attention to the news. (Some people here, in a shocking display of cognitive dissonance, even cheer the police brutality when it happens.)
Here's some statistics and context to put it into perspective: on the criminal justice side, we incarcerate people at six times the rate of nearly every other industrialized nation. We have more prisoners than China. (No, not more prisoners per capita, as a slice of overall population, but more PRISONERS than China, who has 4 times our population.) Only Russia comes close in per capita incarceration rates. The War on (Some) Drugs, mandatory minimum sentences, and the militarized police response after 9/11 have all contributed to this, as well as the prison-industrial complex which rewards enforcement agencies for seizures and arrests and convictions. The privatization of prisons has also slowly turned locking people up into big business. On the military side, we spend over half of all federal tax monies on "Defense", giving us a military budget that is as big as the next 14 nations combined. To me, that's a military-police-prison system that is wayyyy too big for its britches, at all levels.
Meanwhile, our schools and infrastructure and social safety net are gutted as fast as the far-right corporatists can get into power and the gap between rich and the rest of us is the biggest since the 1920s. Leading more people to desperate acts. It is a vicious cycle and it's not even close to done.
It doesn't help that it's way easier to get a gun in this country (even legally) than it is to receive mental health care.
I think the OP is spot on being wary of police and military in this day and age, and anyone who doubts that is probably living a very sheltered life somewhere safe. I'm happy for those people who are so fortunate, but, like many of my countrymen (and women), I will continue to walk on eggshells as soon as police or military are on any given scene (and hope that my rebuttal here doesn't get me banzored from the site.)
http://usatoday30.usatoday.com/news/nation/2007-12-17-Copmisconduct_N.htm (five years ago, but documents the rise of police brutality post-9/11)
www2.ohchr.org/english/bodies/cerd/docs/ngos/usa/USHRN15.pdf (emphasis on police brutality upon people of color in the US)
http://www.nytimes.com/2008/04/23/world/americas/23iht-23prison.12253738.html?pagewanted=all (out of control prison population)
http://en.wikipedia.org/wiki/United_States_incarceration_rate (Wikipedia)