Some people just love the idea of immortality. To me that is a sign of one of two things: either they have not lived long enough yet, or they might be insane. Honestly who would want to live forever in this world of struggle? I am glad that there is an end awaiting.
But even if you agree, you could still fear death, which is calmingly enough, quite sane. Almost all living beings who can feel fear, are afraid of dying. And those who don't will still do almost anything in their power to not die.
I actually feared death alot until a couple of years ago. It's not that something special happened. I just stopped fearing death. If anything it might be related to my faith, but really nothing special happened. What I find strange – or rather illogical, but fear never is – about this whole thing, is that alot of other fears still remained. I mean how can you not be afraid of dying but afraid of talking to some guy who doesn't even show the slightest intention of wanting to kill you? Also it's not like I don't fear a pain – and death might be quite painful. I just don't fear being dead anymore.