Sounds like a killer who knows hes pretty much dead inside, being he isn't able to feel shame or guilt for all that hes killed, and obviously his life means nothing to him anymore. It could be about a soldier( as ToxicityBulletCM pointed out) being that they are conditioned to not feel guilt for killing, and they are pretty much war tools. Being that war is hell, the soldier doesn't care if he dies or not.
Sounds like a killer who knows hes pretty much dead inside, being he isn't able to feel shame or guilt for all that hes killed, and obviously his life means nothing to him anymore. It could be about a soldier( as ToxicityBulletCM pointed out) being that they are conditioned to not feel guilt for killing, and they are pretty much war tools. Being that war is hell, the soldier doesn't care if he dies or not.