I think your idea that the government must be behind it since these things are poping up like this is flawed.
I didn't mean to suggest that the US Government is behind the actions of the troops (except perhaps torture now and then). In general the US government is the one going to be taking most of the fire over this, they are the one left holding the ball after everyone
else has ran off.
Giving the troops inadequate training, and selecting the wrong people to be in the army are both things the government has to address, but that is a far stretch from directly ordering or authorizing the troops to commit such monstrous acts.