This is a joke, right?
Interestingly, it fit with conjectures Qx had already had. He just thought the two wars would likely be mushed together somehow.
Mercifully, the Bible indicates that "only" roughly half the population of the world to begin with--will be exterminated.
First will be 1/3 dying in roughly the same time. Then later on, another 1/3 of what's left will die. IIRC, that comes out to roughly half.