Can you really, Jack, think of the Crusades or The Holy Office (the Spanish Inquisition which, notoriously, nobody expects!), and deny the proposition that "faith can be very dangerous" ['can be', note; NOT 'is']? He doesn't in any event claim anywhere that, because his arguments may be largely science-based, everything his book contains must be experimentally demonstrable fact, with no room for opinion. I think this a somewhat unconvincing point of yours.