The concept of God, and heaven, and hell for everlasting punishment of baddies, is a very comforting one.
It sounds just like the sort of thing you would tell a child whose mother had been killed by a bad person. "It's okay, you will see her again in heaven and the baddy willl go to hell to have red hot pokers up the jacksie for eternity, and in heaven you will be loved, and you are not alone now because, ummm, God is watching over you. Don't be frightened."
And the sentiment behind this concept is very kind, and very humane, but also - it's comforting for children.
And I am not a child. I believe in chemistry, biology and physics. I believe in examining the evidence of a given situation and accepting the most likely conclusion.
If I could have a faith, I would probably be much happier. My nanny would be in heaven waiting for me. But as it is, I know that she has been dead in the ground for 25 years, and she's not coming back. She's gone. She lives on in the memories of those who loved her. Wishes do not change reality, or biology.