I would respectfully disagree with most of the opinions posted so far.
Psychopaths are quite capable of love (for themselves, if no one else), and can show compassion and love for others when they choose to do so. Many psychopaths can behave lovingly towards a spouse or child, yet behave in a shockingly antisocial mode towards others. There is no known compelling organic condition that forces a psychopath to behave in such an antisocial manner, it is clearly a matter of choice. This is why the legal system does not recognize psychopathy as a condition that negates moral culpability for ones actions (as schizophrenia might), and a diagnosed psychopath cannot make a claim of being not guilty by reason of insanity, as psychopaths clearly recognize that their actions are wrong (that is why they take efforts to conceal them, and why despite popular folklore, psychopaths can and do fail polygraph examinations). Psychopaths just see the potential personal benefits of their actions as exceeding the personal risks of possibly being caught and punished. It is considered a behavioral disorder rather than a mental illness in the view of the medical and legal systems…in other words, it is bad behavior.
There could well be contributing factors, and probably are - child abuse, pre-natal issues, etc., but then most sin has factors that predispose us to commit the sin, whether those are the result of our own actions or another’s. It is a tenet of Christianity that none of us will be tempted beyond our capacity to endure.
It should be noted that Psychopathy is also not an either/or condition, it exists on a continuum, and many of us show elements of psychopathy to a greater or lesser degree, i.e., we could all act a little psychopathically in the right set of circumstances or if the goal is sufficient to lead us to make choices to override our moral compunctions. Many people might be surprised to see the results if they took the Hare Psychopathy Screen.
We could probably characterize the condition as a psychological description of a moral issue, i.e., the predisposition to commit evil acts as chosen by the human soul.