To be fair, I haven't deployed to a 'combat' zone. But Abu Ghraib was not just an example of 'things happening'. There's a line, and they obviously crossed it.
Do these things happen? Yeah, they might. But the fact that it did without being squashed quickly, to the point where these guys thought they could TAKE PICTURES of it and it was all good, gives us a black eye everywhere internationally.
As far as the commanding officer being demoted, that is a good thing. However, I'm inclined to believe that these methods were ok'd at higher levels, given some of the memos that have come out. (Don't have them ready at this moment: I'll try to look for them.)