Why are Christians scared to die?

[Wyrd of Gawd]

In my 30+ years of Christianity, I never understood why Christians who were so confident in their eternal destiny would panic over illness and fight so hard to cling to life.  I honestly believed that I would thank God if I ever contracted a terminal illness, because that would mean I was close to my eternal rewards.  You would think that everyone would have felt that way -- that a cancer diagnosis would just mean that God has marked them either for a miracle or at very least a promotion to eternity. 

Instead, I watched through the years as people immediately turned to science to save them (giving God credit of course) and going through the same chemo and radiation treatment as all those folks who didn't have heaven to look forward to.  Then, if they died the brethren would say "The Lord healed them by taking them home to their glorified body" or if they recovered we would praise God for a miracle, even though the sick person was treated by doctors just like everyone else.

I have always thought about this.  In some says I would think logically a person who murdered lots of Children should be seen as a very kind person in Christianity or Islam.  They're sacrificing their own eternal happiness and at the same time guaranteeing the eternal happiness of several children's innocent souls.

A hadith says that children buried alive end up in paradise.  There's another teaching that says you shouldn't bury your children alive.