There is literally nothing more terrifying than an eternity in the dark abyss of nothing.
Originally, religion was invented to explain natural phenomena that couldn't be explained yet by science.
Fast forward to today. Even with an overwhelming amount of scientific evidence to explain nearly every single natural occurrence, people still believe.
Religion is entirely fear based. "Follow me and you will never die, don't follow me and you will burn in a lake of fire for all eternity.
" This is nothing but a scare tactic instilled in young kids who don't yet have the intellectual capacity to evaluate their surroundings.
The idea of entering a void of nothingness is much, much less attractive than the idea that when you die you get to ascend into a beautiful heavenly place where there is no suffering or pain.