Some speculation

By "hereditary" I assume that means one or possibly both parents are known psychopaths. Yet these same parents were also "loving"?

From the Internet: Genetic Risk Factors

There is no “psychopathy gene,” but research tells us that psychopathy tends to run in families. Even if a parent does not have psychopathy, they may carry one or more genetic variants that increase their child’s chance of developing psychopathy.
Most psychological outcomes are caused by the combined effects of many hundreds or thousands of genes. The combined effects of many genes account for about half of the variation in psychopathic traits. This means that some children are born at higher risk for developing psychopathy.
Is psychopathy something people are born with? It’s Complicated. No one is born with psychopathy (or any other psychological disorder). However, some children are born at high risk for developing psychopathy due to inherited (genetic) factors.

Then from my own genetic research about how this works:
When both parents carry one copy or one half of a mutation, it is possible that the child gets the full mutation of the gene through combination, but not always.
A perfect example is the genetics behind malaria. Both parents had parents that caught and survived malaria. The resulting genetic change that tries to protect the offspring from malaria combines from mother and father, and the next mutation down one generation or more, is then sickle-cell anemia. That also doesn't need to be the case, the genetics from both parents must combine, and the result of the combination has to be the next mutation stage, which doesn't have to happen.
This can now be edited with CRISPR and the mutation corrected or removed without harm to the patient.
Perhaps in the future, we may be able to edit many things, such as the triggering mutations that end up as psychopathies.

[Laird]

Hard wired in the brain? Does this mean they've isolated the parts of the brain that cause psychopathy, or they are leaning on assumptions of their materialist faith?

I know the article mentions all sorts of brain-mind connections but it seems somewhat presumptuous to me.

Yep, fair call. I'm not all that comfortable either with the "psychopathy in the brain" sort of affirmations. I do accept though that, while we are incarnated, the brain does affect (mediate) the mind, so, maybe there's some place for it. I do suspect though that there are non-physical aspects to the condition - evil, in another word.

(I actually recall reading this article when it came out, but will give it a re-read as I probably forgot many things.)

I just gave it a re-read too, and it was worth it. Incidentally, I see that I posted it a few years back, so that might have been where you first saw it.

Yep, fair call. I'm not all that comfortable either with the "psychopathy in the brain" sort of affirmations. I do accept though that, while we are incarnated, the brain does affect (mediate) the mind, so, maybe there's some place for it. I do suspect though that there are non-physical aspects to the condition - evil, in another word.

Yeah I wouldn't be against medicated treatment, or even surgical. But it seems that most cases are "uncurable" from a materialist stand point at this point in time.

We know there are cases of people having pretty normal lives even with very odd brain shapes in their skulls, yet at the same time it seems there are somewhat precise physical causes of psychopathy.

Seems...perhaps not explicitly contradictory, but at least a bit odd...