Remus said:
So if murder were legal, I'd deeply consider it, but only as a public execution with a listing of their crimes and a psychologist on hand to back the necessity of these individuals to be plucked from the gene pool for the betterment of mankind.
No psychiatrist with any integrity would do that.
I mean, sure, wish death on whomever you want, but if you want some kind of pseudo-scientific justification for the morality of your decisions, then you're looking in the wrong place. Maybe try religion.
Ironically, rationalization of your own justification in hurting others would be (if you actually were to kill someone and were still able to continue doing so) a psychopathic trait. Psychopathy describes people who don't fit in with a society where empathy is valued and where hurting others is frowned upon.
The guards at the Nazi death camps were not "psychopaths", the people who planned the holocaust were not "psychopaths", the death squad members who lined up women and children and shot them into ditches were not "psychopaths", the scientists of unit 731 were not "psychopaths". Don't equate morality and mental illness, a human being doesn't need to be a "psychopath" to commit atrocities without remorse, they just need a way to justify themselves.