When suffering exists with hope, we yearn for Heaven.
But when suffering leads to despair; then we yearn for release, permanent escape from suffering; escape into un-self-conscious being, reabsorption into the impersonal divine; bliss, Nirvana.
Cultures of despair reject the personhood of God - relationships are seen as a perpetuation of suffering. The Goal is detachment - especially from relationships.
Modernity suffers deeply and despairs deeply; modern Men yearn for Nirvana yet disbelieve it; because modernity starts-from a rejection of the personhood of God, and despair is a consequence of this rejection.
Despairing modern man can only imagine as real a temporary escape from self-hood into distraction or obliterative intoxication; or a permanent escape into extinction.
There are no other alternatives - neither hope of Heaven nor release into Nirvana.