100% sure no doubt that dude was a complete sociopath. I actually read a pretty lengthy article a few years back on how they think a lot of special ops dudes and even fighter pilots are, to an extent at least. It's what makes them more likely to not show fear and overthink when other people would be like "uh, I don't know this is pretty risky" and have doubts.
It was a really interesting read I'll see if I can find it again.