Another thought - and bear in mind I have no psych training, only first hand experience, so this may only apply to my own situation (everybody's different) - isn't it one of the major symptoms of PTSD (combat or otherwise) that the mind shuts down and blocks out the parts of the brain that are being overloaded, in order to protect itself as a whole.
In which case, if it senses that empathy in any situation is too much, it may just shut down the centre that deals with it, making empathy impossible (either short or long term).
That's not a sociopath / psychopath.
That said, based on reading I've done, it's probably worth remembering that there is an overlap with PTSD between neurosis and psychosis, because the one refers to extreme forms of things like anxiety, and the other to anything that changes your perception of reality.
So maybe the fact that people with PTSD show signs of being psychopathic or sociopathic (psychotic conditions), is entirely understandable, but not the whole story.
In which case, if it senses that empathy in any situation is too much, it may just shut down the centre that deals with it, making empathy impossible (either short or long term).
That's not a sociopath / psychopath.
That said, based on reading I've done, it's probably worth remembering that there is an overlap with PTSD between neurosis and psychosis, because the one refers to extreme forms of things like anxiety, and the other to anything that changes your perception of reality.
So maybe the fact that people with PTSD show signs of being psychopathic or sociopathic (psychotic conditions), is entirely understandable, but not the whole story.