In the conclusion:
If you fear death, yet believe that God does not exist, then you are being irrational. Then again, maybe you uncertain whether death is the end of your existence. Are you ready to die?
What about the fear of ceasing to exist? For the longest time I was afraid of dying, and living forever. Illogical, I know. Now I don't fear living forever. But I don't want to cease to exist, and fear that. If I fear it, others must (to what extent I don't know).
I think its a bit too hasty to assume no one can fear nonexistence. Why wouldn't anyone not fear your total destruction? The end of life?