I somewhat agree with this, but I'd say 50 years is a more accurant time frame. I believe the pussification of America, its citizens, and those chosen to lead us began around the same time that the media started showing everyone what war was "really" like.
Almost everyone will agree that the WWII/Korean war generation was one of the greatest that has ever lived. As a Soldier, Marine, or Sailor during that time, when you came home, people celebrated. Victory in war was also celebrated. I don't think that the average civilian has the mental capacity to truly understand combat, especially when seated safely on their couches watching it on CNN, and therefore have no right to become outraged like they did during Vietnam and every war to follow. This country has been going down hill far longer than most realize. Hell, before many of us were even born.
As for disrespectful posters of our President... do you really think that Washington, Jefferson, Adams, Lincoln, or Grant were never depicted in some sort of satirical comic? Art is expression, expression is a form of speech, and free speech is granted to the American people by the First Amendment of the Bill of Rights. Its right there, in black and white...