I'm sorry, you don't. Sometimes there's a scapegoat and sometimes there's just a goat.
Shaun Alexander breaking his foot is completely out of his control. Denny Green coaching, choosing his assistant coaches, and choosing players for the past three years becomes responsible for both the personnel on the field and the quality of the play-calling.
This isn't a situation where Denny Green just stepped in at the beginning of the regular season and has to deal with the mess that someone else created. This is HIS mess. If he wanted an upgraded offensive line, he should have made that a priority in the past three years. If it was a concern of his, he wouldn't have dropped Pete Kendall in 2004 because of a player-coach disagreement. If it was something that was on his radar, there wouldn't have been so many rumors at the trading deadline about the Cardinals trading AWAY an offensive lineman this season.
And Edge? Confidence? C'mon. This isn't some greenhorn rookie you're talking about. This is a constant All-Pro. He knows that he can run. He just has no holes to run through. But leave it to Denny to sign a big name (Emmitt Smith, remember?) when his real problems laid elsewhere. It creates the illusion that he's doing something.
I followed Denny Green for ten years when he was the coach of the Vikings. The man is a snake who rewards loyal incompetents. Richard Solomon is a terrible, terrible assistant coach. But Denny keeps him employed. Even though no other NFL coach would ever touch him. He got lucky with Dungy and Billick (both who have put together Super Bowl teams since leaving his wing) and that's largely what his reputation is based on. But if you look at the personnel he assembles and the assistants he goes out to get and who he blames when he loses and who he gives the credit to when he wins, you'd realize the man is a blowhard buffoon.
You're entitled to your opinion. You're just also entitled to know that it has no basis in fact.