Here's a reporter, Home from Iraq, explaining why it is we never, ever, see an article in our newspapers that explains why, from their own point of view, the 'insurgents' in Iraq are fighting. (If there's been one in the media I read, I certainly missed it.)
If nothing else, it demonstrates that the US military has total message control. Given the extreme danger for an American of venturing anywhere in Iraq these days, I don't find it that easy to blame the media here — except for failing to level with us about what they aren't doing.
Update (5/12): A really interesting and very spirited debate over this editorial is currently running at Romenesko's letters forum at poynter.org. Alas, the forum doesn't allow permalinks to current stuff, so you'll have to hunt for the May 10-11 content.