Your free propaganda is available to practice your killing! Wave flag and then download. Ring bell and salivate little doggy.
Aww, cry more, emo kid.
First off, how's killing in America's Army 3 any different than killing in another game? I know this might burst your touchy-feely bubble, but America isn't the first country to have a military that has killed people before.
Second, there's a new spiffy-but-pain-in-the-ass honor system in the game tailored off of the U.S. Army's core values (LDRSHIP - Loyalty, Duty, Respect, Selfless Service, Honor, Integrity, and Personal Courage). If you incapacitate an enemy, he lays on the ground in the fetal position until he either gets help from one of his friends, or you zip-tie him. If you shoot him, you get a Rules of Engagement penalty and you lose Integrity. You also lose Integrity if you throw a grenade into a room and kill an enemy without first calling out the target.
And third - America's Army has been pretty whitewashed in this version. Along with the ROE penalties I described, the opposing forces in the game are pale Russians, as opposed to the Arabs from the first two. There's a tiny bit of back story to the game involving the Army being deployed in some old Warsaw Pact country... Whatever. It was too hokey not to tune out.
In short - sure, it's a game about the Army, and you kill people. But does that honestly make it any different from all the other games you play?