What goes round, comes round. Not quite. As ye sow, so shall ye reap. Not quite. As you sow, so are you reaped. Nearly. What you sow, is what you become. YES. We kill and we are killed. Sow the aggressor and you become the victim. What is the fruit of aggression?
Moses scratched on a tablet of stone THOU SHALT NOT KILL. Moses and Joshua were told "And you will destroy all the peoples that the LORD your GOD will give unto you." They destroyed sixty cities along with many walled and unwalled villages. (And the inhabitants.)