Maybe: The burnt men (most likely derelicts), for money, volunteered as Trinity test subjects but now live in between physical and non-physical worlds as a result of the rifts in time and space that the blast created. The military sent Major Briggs to investigate places where there might be such rifts but was not allowed to tell anyone about it - Twin Peaks being one of them.
I'm thinking there are supposed to be "Dugpas"
Taken from http://theosophy.wiki/en/Brother_of_the_Shadow:
"Brothers of the Shadow" is a term given by the Occultists to the Dugpas (also referred to as "Dark Brothers" or "Black Adepts"), that is, to Sorcerers and all practitioners of black magic.[1] In one of his letters, Mahatma K. H. talked about them as being "our greatest, most cruel, and — why not confess — our most potential [powerful] Enemies".[2]
The Brothers of the Shadow can be embodied or disembodied.[3] In the case of disembodied wicked human beings, they are also called elementaries. H. P. Blavatsky wrote:
The Brothers of the Shadow, devoid of physical bodies save in rare cases, bad souls living long in that realm and working according to their nature for no other end than evil until they are finally annihilated—they are the lost souls of Kâma Loka as distinguished from the “animated corpses” devoid of souls which live and move among men. These Black entities are the Dugpas, the Black Magicians.[4]
Fire walk with