There is a difference between DIAGNOSIS and
EVALUATION or PROFILING.
Only a qualified mental health diagnostician
can determine whether someone suffers from Narcissistic Personality Disorder
(NPD) and this, following lengthy tests and personal interviews.
But when there is no access to an individual,
mental health diagnosticians often EVALUATE or PROFILE that individual remotely,
based on publicly available material.
The FBI routinely profiles mentally-ill
criminals (such as serial killers). Psychologists frequently evaluate the
mental health of politicians in peer-reviewed papers.
Erich Fromm, the towering psychoanalyst,
remote-evaluated both Stalin and Hitler, suggesting that both those butchers
were narcissists.
Secret services have entire departments
dedicated to the remote evaluation of the mental fitness of foreign leaders.