In game, (it's a game about hunting down sex traffickers & other lowlifes) you can enjoy your work since it's just a game and they're scum. There's no warcrimes tribunals for people who kill sex slavers. Kill em slow.
IRL, war crimes are a part of every war. Taking prisoners is a waste of time and resources, so shit gets real during a tour of duty. Hopefully I never gotta fight a real war!