I remember reading the book some time ago (via Google books where surprisingly nearly all of the book was there, or at least it was at the time). I remember the pro-involvement in Vietnam side of the people they talked to for the book coming across as very ignorant to me, as their reasoning pretty much came across as "it happened so it was meant to happen and was going to happen". A more fact supported reasoning would have been ok with me, but I do remember feeling that they were just saying it was going to happen because it did happen, and that annoyed me when I was reading their side of it.