First I will briefly review Griffin's book, then respond to the 1-star reviewers on this site.
The thumbs-up and thumbs-down:
There are points at which it seems Griffin's theological background does him a disservice, because the tale he spins comes across poorly as a homily. Too often Griffin argues manipulatively, and uses rhetorical tricks unbefitting someone claiming to write a dispassionate expose of the facts. Evermore sad, these machinations are largely unnecessary--Griffin's points ARE rivetting, taken in their entirety. Griffin's scholarship IS generally sound. The connections he makes are, for the most part, logical and difficult to refute. Griffin should have stuck to the facts, acknowledged where his points leave room for debate, and allowed his laying out of the evidence to chew upon readers resistant to the upshot. Griffin too frequently uses cymbals when a metronome would do.
All that said, I have yet to read a solid rebuttal of Griffin's manifesto, or anything countering the inertia built up by his relentless blizzard of facts. I have seen people deflect specific hailstones of Griffin's, but no one has yet succeeded in outshouting the storm.
As for the knee-jerk naysayers: I'm sorry, but saying "US government complicity in 9/11 is impossible because it would be just too, too mean and evil of them!" is not a fact-driven argument. None of us are psychic, or psychologists worthy of mapping all possible rationalizations government members might entertain for complicity in 9/11. Perhaps they believe they are front-ending an inevitable war, amounting to fewer casualties in the long run. We know that the Project for the New American Century put forth an unapologetic call for taking over virtually all of the Middle East, and to hell with civilian casualties and American lives spent in the effort. In short, arguing that "US complicity in 9/11 is too evil to be possible" is a childish, emotion-driven, historically blind sentiment that has no place in a serious review of the facts.
Second, Snopes.com does not offer a thorough discussion of the Pentagon crash. It does not address the issue of confiscated cameras, nor the absence of airplane fuselage or engines or the appropriate number of bodies, nor the dearth of black box recordings, nor the fact that the jetfighter-swoop into the building was supposedly carried out by a pilot whose instructors declared him unfit to fly straight.
Third, the connection Griffin draws to specific Isreali companies and factions (who would hardly have the interests of the Israeli people at heart) is in no way an indictment of "Jews" as a whole, and to suggest otherwise is absurd. Crying "anti-Semitism" in this case is the rhetorical equivalent of arguing that any implication of corruption in, say, The Christian Coalition or The American Family Association amounts to throwing all Christians everywhere to the lions, or any implication of corruption of an American company amounts to hatred of all Americans. Silly, unfair, and pedestrian in the extreme.
Fourth, arguing that "US complicity could not have been possible because SOMEONE would have blabbed" shows an inattention both to how military works (soldiers take orders without question), and to what has happened to people who have tried to "blab." Examine, for example, the wholesale ruin and discrediting of whistleblowers and critics like Paul O'Neill, Richard Clarke, Sibel Edmonds, Colleen Rowley, Ambassador Wilson, UN inspector Scott Ritter, Karen Kwiatkowski, Rep. Murtha, etc. etc. There has to be an audience and haven for "blabbers" for any sane person to take that risk, especially when exposing something so explosive.
Fifth: the argument about the 3 towers (including WTC 7, never struck by a plane) being brought down with explosives is not just about the fact that they DID collapse, but about HOW they collapsed. The South tower fell first, though its fire was nearly out, and the burning fuel almost completely confined to the outer surface of the building. The towers fell inward at freefall speed, generating huge amounts of powdered dust from the top, in easily removable, neat sections. All of these conditions, historically, have only taken place in cases of controlled demolition. FEMA refused to allow engineers to inspect the evidence, and had the steel shipped off for recycling within an astonishingly brief period.
Finally, one need not be convinced of all of Griffin's conclusions to appreciate the damage Griffin does to the credibility of the 9/11 Commission Report. Any outright dismissal of this book without a solid attempt to engage the bulk of Griffin's points is an intellectually lazy, sycophantic move that is itself worthy of dismissal.