Consider this, perhaps you have never been beaten so low, been so far from any hope to grasp at anything that promised you any possible comfort in the only space you could call your own, your own mind.
While I share the disbelief you profess I fully understand how some might believe. The powerless, the slave, the weak and feeble, those who know there is no salvation while they take breath. These are the ines who will believe and hold fast to that belief.
The dogmatic will find their faith shaken when no succor arrives, the life-long believer who is tested and is disappointed wil question or reject their faith.
But the truly hopeless will find comfort in religion because that is the only place they can place hope, not for the present, but for the future in a place not found among the living.