That this didn't occur to him before he put his name behind LC reflects very poorly on his competence in his field of expertise.
Even the best of us make mistakes, however. And if Mr. Christison is as good as you say, then I look forward to reading his retraction and apology.
Nonsense. His field of expertise was intelligence work. His current position, whcih when you figure he retired over 25 years ago, is as writer, commentator, and at this point, political activist of a sort. He's been at that for 20 years now.
So, his motivations, based on his experiences, are not "intelligence" oriented, but policy oriented, and thus politically oriented.
The problem with the experiences he had "in the saddle" is that over time, some of it is perishable as world events, leaders, and personalities change. The decision to induce change in the Mid East at the point of a bayonet was met with a lot of internal opposition. Colin Powell lost three, IIRC, senior leaders in the State Department over it, as an example. A lot of the internal "this is a bad idea" was undertaken discretely. What we saw in the media, regarding the disaffection some military, state, and intelligence opposition to a poor strategy was, I pomise you, the tip of the iceberg.
I was on active duty at the time, and I saw an immense risk, strategically, in the Persian Gulf of weakening Iraq, since it would embolden Iran, who has been our real enemy in the Gulf, at the nation state level, since 1979. I wasn't the only guy who saw that.
I was also one of those guys who heard President Bush's comments on "Axis of Evil" with Iran, Iraq and North Korea and wondered "who the hell is writing this crap for him?"
I was one of the guys, among many, who heard his deliberate use of the word "Crusade" in his comments in re the Mid East, and wondered: who is writing this crap?
So, while BC is of a different generation in service to US foreign policy than I am, I have a strong sense of where he is coming from.
Plenty of decisions in Washington seem counter intuitive. When Clinton chose to bomb Serbia, I was one of many who asked "who the hell (I am sure it was some Air Force sorts) convinced him that this is going to work in the long term?"
DR