Or, sometimes human beings act like human beings, even in a time of war. In addition to the whole notion of "rules of war," there are thousands of examples, but here is a famous one:
https://en.wikipedia.org/wiki/Christmas_truce
> The truces were not unique to the Christmas period and reflected a mood of "live and let live", where infantry close together would stop fighting and fraternise, engaging in conversation. In some sectors, there were occasional ceasefires to allow soldiers to go between the lines and recover wounded or dead comrades; in others, there was a tacit agreement not to shoot while men rested, exercised or worked in view of the enemy.
People like you and me work at computers all day and start to think like computers and try to use "logic" to explain everything away. Fortunately, there are real people in the real world who are free of our burdens.