That's just a... -Can I...? ventromedial anomaly.

In the presence of a threat, the brain activity shifts from the ... the ventromedial prefrontal cortex to the midbrain periaqueductal gray.

Studies have shown that people with damage to the Ventromedial Prefrontal Cortex are actually more willing to sacrifice a human life as long as they perceive that it's for some greater good.