Jacques Nassar (remember him) also said that the Explorer fiasco was all Firestone's fault. Apparently he did not think that Ford's specifying an unreasonably low tire pressure (since Explorers tended to flip at the normal 30 psi) had anything to do with the extreme failure rate of the Firestone tires - and the related rollovers.
Apparently your exhaustive research on the Explorer fiasco failed to turn up anythng about this.