What I'm going to say is that war is the worst possible display of inhumanity you're ever likely to imagine in your darkest nightmares.
I have several friends who have all served in elite military units. I have a photo of myself with Dick Marcinko from a few years ago. I've never served with any of them but I've spent good time with them and talked.
The reality of war is so horrible and dehumanizing that many never fully recover. I have a short list of friends that cannot sleep without chemical aid. One friend drank not a sip of water for over two years, instead drinking himself to a state of numbness until he was able to finally recover. He's killed many many men.
So I'm going to temper my own judgement of these men's actions with the knowledge that we train, equip, and expect these men to plan murder for our benefit. We expect them to inspire fear. And we send them into far off lands, away from their homes and loved ones, expose them to unimaginable cruelty to the point where their psyche is forever scarred, and then forget about that sacrifice once they've destroyed enough of themselves and others to satisfy us.
We command these men to look into the abyss and forget just how much the abyss is staring back into them.