Psyhcological assessment of a nefarious form of sub-human sentient life

A person I know has major psychological problems. I had referred to this person as a "waste of skin". Another made reference to the uselessness of female sexual appendages on a large male bovine. This person seems to to be so far beyond hope that I have had to give up trying to help and have cut it lose (this sentence contains no grammatical mistakes).

I try to understand what the problem is but can't. It is always useful to identify the traits of a problem. Labeling the problem is the first step to understanding.

I don't know if there is already a scientific name for the traits that it exhibits so I did my own assessment and came up with "delusional sadistic necrophilia". As a necrophiliac derives satisfaction from dead people (I widened the definition from sexual pleasure to any pleasure) and a sadist from causing pain, beings who get their jollies by hurting the dead are sadistic necrophiliacs. As most people believe that it is at the least very difficult, and in my view impossible, to hurt dead people from the instant of their transition on, a sentient entity (it) that believed it truly could pull it off would certainly be labeled delusional.

Further study requiring line of sight viewing has become so distasteful that I can no longer work with it using my 11 foot pole. The subject is so disquieting to the average individual that I have only been able to discuss it with immediate family, my very closest friends and all the guys at the bar (I'm no lawyer).

I plan to look at existing research to find if other examples exist, if it has been studied and if a diagnostic label has already been applied.

I did find a reference to similar behavior in a poem by Kipling. Although the poem refered to the animal world, the last quatrain sent chills down my spine. Could there be a lifeform so base to be capable of eating the flesh and defiling the name?

The Hyaenas
by Rudyard Kipling

After the burial-parties leave

And the baffled kites have fled;

The wise hyaenas come out at eve

To take account of our dead.

How he died and why he died

Troubles them not a whit.

They snout the bushes and stones aside

And dig till they come to it.

They are only resolute they shall eat

That they and their mates may thrive,

And they know that the dead are safer meat

Than the weakest thing alive.

(For a goat may butt, and a worm may sting,

And a child will sometimes stand;

But a poor dead soldier of the King

Can never lift a hand.)

They whoop and halloo and scatter the dirt

Until their tushes white

Take good hold in the army shirt,

And tug the corpse to light,

And the pitiful face is shewn again

For an instant ere they close;

But it is not discovered to living men

Only to God and to those

Who, being soulless, are free from shame,

Whatever meat they may find.

Nor do they defile the dead man's name

That is reserved for his kind.

I'll keep you posted on my findings.