One of the letter writers uses the Bush and Johnson lied us in to war argument. This is really weak. The progress toward war in Vietnam was much broader than events in the Tonkin Gulf that may or may not have happened. If the Johnson administration was looking for a causus belli, it did not have to wait for action on the high seas. The North Vietnamese were already in clear violation of the Geneva Accords which prohibited all parties from military activities in Laos. The reason Johnson did not use this as his reason for going to war was his reluctance to engage in Laos where the violation was taking place. Shutting down the Ho Chi Minh Trail would have defeated the communist, according to their own historians, but Johnson and McNamara were not willing to use overt force in Laos. By restricting the US to transitory force, i.e. raids by special forces and raids by air craft, and refusing to use a blocking force, they committed the US to a much more difficult war in South Vietnam.

They further complicated the war within South Vietnam by restricting the number of troops below that needed to control the space. Unlike Iraq where the commanders have gotten all the troops they requested, in Vietnam troops provided were always significantly below the amount requested. ( I know about Shinseki's observation of troops needed in post war Iraq, but he was never a commander of operations in Iraq and his statement was made in the context of a wag (wild ass guess) in a congressional hearing and not as a result of analysis by staffers working the problem. The facts are that Gen. Franks and Gen Abizaid got the troops they requested.

The WMD "lied us into war meme" is also weak. First those making it also believed Saddam had WMD, they just were not willing to go to war to remove the threat. Second there were several reasons beyond that for going to war and one of the most important was Saddam's failure to account for his WMD as required by his cease fire agreement in 1991 and by numerous UN resolutions. His failure to account was reason enough to believe he posed a threat. Even after all the work by the Iraqi survey group, much of his WMD is still unaccounted for. Saddam's failure to account put the US in the position of taking the word of a madman or going to war. Apparently the crits would have preferred to take the word of a despotic psychopath.