This is simply a fan faction called the Blood for fallout lore.

The blood believe that the only way to purify this world again is to slaughter any dirt in this world. Many will fall but for a good cause. War never changes. By slaughtering hundreds we will restore the world back to how it was without pillagers,raiders or ferals.

Join us and help clear what once was Earth and restore it back to its free state

Blood handprint

The blood is watching you and thanks you for your participation in the slaughter.