You assume they aren't using a well-thought out rationale based on what? They don't agree with you? Their government may not be 100% truthful? You have obviously "discovered" that, so why couldn't they? People can come to different conclusions or have different opinions based on the same set of facts. To suggest that most people disagree with you simply because they are misguided ignores the fact that good people can disagree and is indicative of an overinflated ego.
A majority of US citizens agreed with my perspective before the war started . . . within days the majority disagreed. What changed was not the basic facts . . . what changed was we had been committed to war by our President (and weak Congress) . . . that's not a rationale for war, it's a rationale for supporting the troops.
You are certainly right learned people can draw different conclusions from identical information . . . say the aluminum tubes
or Nigerian nuke connection
or the utility of Eritrea in a coalition against Saddam
. What is far more common is that people never step back from their preconceived notions to view data sets. The State Dept and DOD have VERY different perspectives on a myriad of issues. They give credence to data which supports their positions while ignoring if not denigrating opposing information (or sources).
Most of the world agrees with my impressions of the war on Iraq . . . but most of my country does not. The countries with supporting pluralities are US, UK, Kuwait, and Israel. Do these countries have greater insight into the conflict or the nature of Saddam's regime . . . do you think anybody knows Saddam better than Syria or Iran? The disagreement was NEVER on the nature of Saddam's regime but on the manner in which the world should address it. The Bush admin (with pivotal support from Blair) created the false dichotomy of invade now or do nothing. I don't understand French AND Russian motivations to be so oppositional to the clear necessity of addressing Saddam in a meaningful manner . . . but just calling it greed is just as simplistic as saying Bush is ignorant . . . true but hardly sufficient to carry an argument.
Oh . . . I do believe my ego is sufficiently inflated NOT overinflated.