I agree there appears to be some abnormal family dynamics, like Mr. Arias' detached police interview, where he seemed in agreement with and resigned to her guilt, Sandy's inappropriate behavior in the courtroom, her brothers failure to appear for deposition, what appeared to be token appearances in the courtroom by each family member in turn, which merely implied support rather than actually showed it (can't blame them, but it's really an either or decision - they made it ambiguous), as well as Nurmi's reported strangeness during his visit.
Arias' psychopathy is not, imo, a result of these dynamics, however. Her personality is not resigned and repressed like that of her siblings appear to be, for example, and she had enough of the dysfunction to leave home at an early age. I believe JA used the family dysfunction to her advantage, however, using guilt and confrontation to manipulate them into supporting her, both before and after the murder.
*Nods* I don't believe that any of her background
excuses her, but that the childhood environment plays a BIG part. I said a while back, that she knows what she did was wrong (wants to hide truth on day-to-day basis), she just chooses to ignore her conscience. Yet the truth is, not all psychopathic minds kill, this has been proven with brain scans in recent decade(s), scientists acknowledge that social environment, specifically early development, makes all the difference. The earlier these traits are taught (subliminally), and as for the tantrums, the longer parents don't acknowledge it with counselling, the bigger problem law enforcement/society has to deal with later on. But their kids usually have a record in the prison system or juvenile facilities by then. JA didn't have a criminal history, she always had someone to cling to/some boyfriend. She could have had restraining orders against her, and whatever California does with investigating those pets...
I just think the negative environment (which is at least, emotional abuse) equates to like, what expectations did they have of her when she was born anyways? Seriously? I believe they had some big restaurant to run, or to that effect as well. I mean, I've met people with busy parents, but at the same time, they spent the time to ensure proper upbringing so they could make something of themselves. I don't think they did that with her, it shows.
Sandy's, IMO, ill-driven temper and snarky judgement is probably only in the *off-position when you're "on her side," or I guess if JA commits homicide and now they need money. Bill Arias distances himself but he's oddly patriarchal in certain photos, I don't imagine he knew what to do about having a daughter(s) in the first place. That's what I was saying about not buying his projected image (to me, he comes across as controlling and IMO, he knows how to charm* others 'to his side' as well, he was cajoling Det Flores). I figure the Arias' wouldn't get on well with the average/higher-than educated person in personal settings though, whom registers strong dislike of 'snarkiness.' They were uncomfortable about expressing empathy to the Alexanders, but the sorrow they feel, is ALSO for themselves/their image. Jodi's narcissism? To reap what you sow...
She was brought up in a small town, not many places to go, and no other noticeable influences that have ever come forward to say they attempted to really give her a childhood, nothing whatsoever (I don't feel sorry for whom she is NOW, mind you, and some of this is according to her younger sister's random statements on her social media account). I mean, even a psychopath's parents comes out to say, "YOU can't kill MY kid." That doesn't mean I'll personally find them independent to what happened.
I'd have to say, sibling wise, the eldest usually receives the 'brunt.' There are more 'mistakes' made as it's their first, so depending upon who's doing the parenting, if they're not one to care what's causing their child anger (especially, if it's themselves), you can definitely end up with an anti-social personality. Born-psychopaths don't necessarily commit homicide either; psychopaths whom have had their brain images scanned are SHOCKED when they discover this, due to their upbringing/their own family and respect of life, and also because the child psychopath till date, has not been proven. The best case scenario they had of finding *one* was a long time ago, and I believe she got counselling, got better and made something of herself.
I think I should end my post, lol, but I think she represses WAY more than the other siblings, she doesn't repress when she gets stressed, she can't control it anymore, or when she's being watched (the REAL Jodi is hiding even MORE anger and hatred than what she let's out under interrogation and/or in the courtroom, until Samantha says something that triggers it, she's usually masking 'the rest' of it). Her feelings are internalized, they're just not good ones (anger, hurt, more anger, shame at getting caught, etc etc). She got those feelings from somewhere*, but it's just impossible for me to think negative early influences didn't contribute to her out of control behavior. I mean, how many people that don't graduate high school come from remotely good homes? I mean, unless you have a real intellectual deficit... there should be no reason for that.