Does Saunders create bad defense?

This was posted on the KC Chiefs website by Bob Gretz on January 19, 2007, in an article about defensive rankings:

"WASHINGTON’S DEMISE: Could it be that what the Chiefs proved for the better
part of five years and what the Redskins showed in 2006 is that it’s
impossible
to have a good defense when Al Saunders is your team’s offensive
coordinator?

There are plenty of people in the NFL, and around Arrowhead
Stadium,
who don’t think it’s a coincidence that when Saunders took over
preparing
the offensive game plans for the Redskins, their defense turned in a
very
bad season. . . . "

I hope he is joking. Al Saunders, offensive coordinator of one of the best offenses in the league, was apparently responsible for the Chiefs horrible defense. It had nothing to do with the GM spending early picks on Ryan Sims, or Eddie Freeman, or William Bartee. It had nothing to do with playing Eric Warfield and Dexter McCleon. Or having no edge pass rushers like the current tandem of Jared Allen and Tamba Hali during 2001-2003. Oh, and Saunders apparently made Adam Archuleta suddenly become terrible, depleted the Redskins depth due to continuous trading of draft picks in seasons he was not there, and injured their starters through his poor game planning.

Amazing. I would try to rebut this with actual statistics, but what is the point. Clearly, Gretz is the master of correlation versus causation.