Trying to terrorize people with the concept of Hell in order to to get them to believe in god or jesus,
And then telling them that if they do believe, they can have the nonexistent bliss that is heaven.
I don't buy it.

It is like me coming up to you and saying I have tons of money for you,
But the only way for you to get it, is to believe in my imaginary friend.
However, if you don't believe in my imaginary friend, I will kill you personally in the worst way possible.
It's almost exactly the same thing,
It's just that the legal term for what I'm doing is extortion.