“Now it came to pass that when Nephi, the son of Nephi, saw this wickedness of his people, his heart was exceedingly sorrowful.”
Being a prophet, Nephi had a great love for the people he served; even those who would not listen to him. The unbelievers weren’t just ignoring him. They had strayed so far, in the opposite direction, that they made a plan to kill! Nephi was heart-broken. I suspect he’d been heart-broken over the unbelievers for a while. But now, the unbelievers were going to impose their beliefs on the believers. Maybe they thought that by threatening the believers with death, they’d denounce their faith? Bad things happen to good people as well as the bad. God doesn’t impose His will on anyone. Unfortunately, that means that bad people are allowed to act according to their choices. Our choices, good or bad, always have an effect on someone else. The thought that “it doesn’t hurt anyone else” is simply not true. If we weren’t allowed to follow through with our choices, there really is no such thing as choice. (But that’s a subject for another day.)
Although death comes to all of us the timing is not up to us. The repentant and the innocent can be assured that they will live with Christ after death, but we came to this earth to learn. Each of us has a purpose here. Our duty is to stay alive, as long as we can, to fulfill that purpose. We may not know all the purposes we have until after we die and have 20/20 hindsight. If one of God’s children takes the life of another, they are pretending to be God. Only God knows when our purpose here is fulfilled and its time to go back to Him. Young children have no need of repentance. They are too young to sin. When young children die, they go straight into Jesus’ arms. But only Satan would try to convince one that that justifies the killing of children!