There are two concepts here:
"There's no doubt in my mind that the dialogue here in Washington strengthens our democracy. Period."
-- Marine Gen. Peter Pace, chairman of the Joint Chiefs of Staff, rejecting the notion that congressional debate about the course of the war in Iraq hurts troop morale or emboldens enemies of the United States. (link)
A. Dialogue in Washington strengthens our democracy.
B. Congressional debate about the course of the war in Iraq hurts troop morale and emboldens enemies of the United States.
Here's what you should understand: A does not "reject" B. Nor are A and B mutually exclusive.
In fact, A+B=C
C. Dialogue in Washington revolving around the best means to lose the war quickly will have no effect on our democracy at home, but will cripple our efforts overseas, hurt troop morale, embolden our enemies, and force us to ignore the whiners and nay-sayers, and win the war without them.