Not that it isn't the likely result of said group unexpectedly oozing out of their fuck-off cocoons dotting the wasteland their forebears created, but...
spoiler
the vault dwellers weren't exactly Reavers, sowing psychotic ruin in every step. More like baby Nazis squirming from the nursery vats, blinking in the light of the new world and unaware yet that the world doesn't want or need them. 🤓🤌🏼