I am not entirely certain what your question is but I will try to respond as best as I can based on what I did understand.
Life is a blessing of Allah and we must protect it and safeguard it to the best of our ability. This includes the lives of others as well as ourselves. The life of a living thing can only be taken or jeopardized according to the Commands of Allah.
@Hanif, all of us have 2 deaths and 2 lives. The first death is when our constituent parts are a part of the universe and have not come together into the shape of a living being. Then, when those parts come together, and a living thing is born, this is the first life. Then, that living thing dies and this is the second death. On the Day of Judgement, all living things that died will be raised up again to face the Judgement. This will be the second life and this life will be forever. There is no death in the second life. It doesn't matter whether one's eternal abode is Heaven or Hell.