I don't think Stallone said he wanted to make a popcorn flick with John Rambo. In his chat at AICN he said he wanted to show realistic wounds in a time of war. And I'm not sure the shit that takes place in Burma is that far from reality, btw.
He said that if anything he downplayed the violence because if he showed everything that was going on in Burma in the film would get an NC-17 or X.
Rambo 4 is a brilliant action movie. The last 15 minutes is one of the best action scenes I've ever seen. It's action porn. The rape and pillage of the Karen village is one of the most horrifying things Ive ever seen on film. Stalone felt he had a duty to show what was going on in Burma, and man did he wake some people up. This is a movie about standing up to horror and evil. The message of the film is that pacifism only gets you so far. If really want to stop tyranny you have to be willing to fight and die for it. This a movie for guys who like seeing other guys kick ass and chew bubble gum.
It's like he made a check list off all the types of evil people:
-Rapists: Check
-Murderers: Check
-Child molesters: Check
-Communists: Check
-Torturers: Check
So that when he kills them in the most GLORIOUS of fashion it becomes all the more satisfying.
Watching the behind the scenes stuff was very telling. The guy who played the main bad guy was actually a former Karen rebel and felt that this film needed to be made to get the message out. Even if it meant the government killing his relatives back in Burma. Also the film is a huge hit with the Karens(big surprise) and they have used it to bring many to their cause.
And to the post who thought the last scene was like a video game: You need to see Hard Boiled, Shoot Em Up, and Commando. Trust me, Rambo is not nearly as over the top as they are.