They'll always find something to believe in...look at Scientology.
Death is the one big scary monster lurking in the corner that no one likes to talk about and no one escapes. People want to believe that some wonderous paradise awaits them and that their beer swilling foul mouth redneck neighbor that they can't stand won't be there because he isn't a "club" member.
I believe in the time of it's conception the bible served a purpose, when law and order was hard to find and life was so hard you were lucky to reach middle age it kept everyone from saying fuck it all...killing each other off and robbing each other blind. Because it promoted fear of the unknown, do wrong and face hell and damnation, do right and a better life awaits you.
But we have evolved though the years, we no longer fear life the way we did then, those "rules" unfortunately didn't evolve...and in the process have become the catalyst for more bloodshed, hatred, and bigotry than anything else ever written.