Dear HP - I enter my reply to your remarks here, rather than in the combox.
I really do not know what to think about Gen. McChrystal's remarks.
I think it possile that he wanted to "fall on his sword" in order to dramatize what he considers to be an appalling lack of competence and conviction at the highest level of civilian leadership.
There are ways to do that, which do not compromise the absolute and indiscutible principle of civilian control over the military.
So, it was folly: either a perplexing lack of discretion, or a consternating failure of prudence.