nietsczhe writing about the consequences of the hypothetical death of religion from mid nineteenth century europe is like somebody standing on the moon and wondering out loud about the potential consequences of heliocentrism.

he was so ridiculously out of touch with the reality that existed around him that it's an absurd waste of time to bother with him.

if you want to have that debate, go back a few hundred years and read voltaire and swift and the lot of them instead, back when the debate actually mattered.