Humans will readily sacrifice others for what they desire. This does not always involve the shedding of blood. But they have no qualms ravaging a soul.
The evil love sacrifice: it gives them power. And there will never be enough to sate their hunger. So, the world is filled with suffering.
Those who give their lives for others, have not given up on themselves. Someone was going to die, and they did what needed to be done. We remember them and mourn their passing.
Those who sacrifice others for the sake of desire have spread this wickedness both far and wide. Their victims' blood cries out against them. Should such receive as they have given, their end will be miserable indeed.
Our lives can be a blessing or a curse. It all depends on what we do with the time we have. We can build up or tear down.
No good deed goes unpunished, but that should not deter us. Evil thrives when the good do nothing. The trick is not to fall on your own sword: use it to make them fall.