well dear mazhar what is their in it which hurts u, i can just say one thing that do u really thing allah feels very happy if one of their children is killed by another,animals r also allah's kids. each one has been sent to do their duties, animals r bound to behave like that and kill to survive but in this human form if u behave like animals then this life as a human being is not worth it. if i take u to a slaughter house to chop ur head off saying that it will benefit humanity, how would u feel