well, you covered my moral code right there.

you already said, all I need is the why

1. humans are the same species as me, nothing hurts me more than seeing one of my own destroyed or dissappear. Nothing can remake that person and nothing can bring them back, it makes it so sad.

2. I feel when someone tries to kill others out of contempt or for power or whatever, they have lost their humanity. Because not killing someone I consider a basic human feature, and so they have lost it and it is like killing a beast.

3. Last, same as above.