This is an incredible book. Without apocalyptic belief (religious or secular), we are effectively silenced. It makes me think of John Pilger's words in his defense of Julian Assange:
'In the 1970s, I met Leni Reifenstahl, close friend of Adolf Hitler, whose films helped cast the Nazi spell over Germany.
She told me that the message in her films, the propaganda, was dependent not on “orders from above” but on what she called the “submissive void” of the public.
“Did this submissive void include the liberal, educated bourgeoisie?” I asked her.
“Of course,” she said, “especially the intelligentsia .... When people no longer ask serious questions, they are submissive and malleable. Anything can happen.”'
This submissive void is what Altizer points to when he says "And we are silent today, perhaps more silent than ever before, which is truly remarkable given the cacophony of our technology."
Altizer doesn't mention Zizek, but I wonder whether his ideas are compatible with Zizeks's The Fragile Absolute, or Why is the Christian Legacy Worth Fighting For?