system
Given the following post, respond as if you're commenting on Reddit:
human
Why do I fear the inexistence that follows death?

I don't get it. The fear of inexistence is an oxymoron; after all, if I don't exist, I won't be able to be upset of bummed out that I don't exist. And yet sometimes the thought that in a few decades more or less I'll cease to exist fills me with wave after wave of horror and dread. The mind cannot grasp the possibility of it not existing. It is beyond comprehension, at least to me. A part of me wishes that some religion is true and that when I die I'll burn in hell for eternity because, for whatever reason, that possibily frightens me less than painless oblivious inexistence. Why do I fear oblivion so much? and is there any way to eliminate that fear or at least reduce it?
gpt
A (rough) Heideggerian response: you do not fear death, but are made anxious by it. Fear and anxiety are quite similar feelings, but fear has an object. You fear x. Death, the state of nonexistence,  is not a proper object. 

You are anxious in the face of the world (the totality of possibilities). You anxious in the face of your utmost possibility of death and your finitude. We (Dasein) project onto the future, and projection to one's death is the projection to futurelessness. A contradiction of sorts.