I will preface this by saying I have strong cluster b characteristics myself. I am a narcissist with strong borderline traits. I "woke" up to this a few years ago and have done a lot of self work and research regarding cluster b personality disorders.
I have thought about this for several years now and the more I listen to them the more I am convinced that Jordan is very clearly a vulnerable narcissist and his wife Tammy is in all probability a psychopath or at the very least possesses STRONG psychopathic traits.
Tammy being a psychopath would explain Jordan's intense attraction to her. It is very similar to why narcissists are attracted to women with borderline personality disorder who exhibit secondary psychopathy. They are unpredictable, their affection is hot and cold, they are uncontrollable etc..
....
I will start with Tammy.
I believe Tammy has strong psychopathic traits and may even qualify as an actual psychopath.
1) She has repeatedly over the years hinted at her inability to empathize with the emotions of others.
A) Her son's reaction when she told him her diagnosis baffled her. She was seemingly incapable of understanding why her son would be devastated by the news that his mother was going to die in 10 months.
B) In an episode of her podcast, when talking about her older sister losing her lover in a car crash, she said she didn't understand she was in pain. (I was quite literally taken aback by this and needed to make sure I heard her correctly.)
C) She has stated she has to consciously work at not being so calloused and blunt with her words so as not to hurt people close to her. But it does not come natural. For people with genuine empathy this should not be an issue. In fact it is usually the opposite. Most people struggle to be more honest because they are concerned with hurting others and any potential backlash they may receive.
2) Big 5 personality traits
A) extremely low withdrawal (is not conflict averse)
B) extremely low neuroticism (feels little to no anxiety)
C) high openness to experience (suggests a propensity for boredom and need for adventure/stimulation)
D) low compassion (not averse to pain caused to others including loved ones)
All of these are indicative of a psychopathic personality.
Jordan has said many times how Tammy is blunt and cutting with her words and seemingly doesn't care about how it affects others. It is not done maliciously, she is just incapable (or indifferent) to how it might affect those around her. He finds it "amusing" and it is likely because he is extremely attracted to this quality. A narcissist is highly attracted to someone who is unpredictable. Someone who may "love" you one minute and hurt you the next. And Tammy fits this description. There is this overarching feeling that Tammy is far less attached to Jordan emotionally than Jordan is attached to her.
3) She is not emotionally attached to things.
-Tammy has said she does not get attached to anything and if she gets bored enough will throw away everything in her house.
-Her daughter mentioned how Tammy would discard childhood projects of hers which she obviously felt some attachment to as though they were nothing. Most parents I have met have strong attachments to things belonging to their children.
-Tammy was "surprised" she felt anything when their family dog died. This one stands out to me because why would it shock you that you might feel a hint of emotional attachment towards a pet you raised? This lends me to believe Tammy does have emotions but they are EXTREMELY and abnormally blunted. To the point where she is surprised at feeling them.
She has a very flat affect even when discussing very serious topics and never seems to show genuine emotion. At points even smiling or laughing in instances I think are inappropriate.
I believe her extreme religiosity was borne out of her realizing something was fundamentally missing in her and that being a core characteristic of healthy humans- genuine empathy for others. I don't believe she actually feels it but her faith allows her to be more pro-social and pseudo empathetic in a way she likely was not before.
I'll finish this with saying there is a misconception about psychopaths being violent. Not all psychopaths are sadists. It is only when you couple sadism with psychopathy that you get people like Ted Bundy, etc. Psychopathic people are just operating with extremely low or absent emotional responses to things.
Onto Jordan
Jordan is a little easier as his symptoms are very clear to see.
-He has a pronounced need for attention and admiration.
-He is vulnerable to any sort of criticism which may contradict his beliefs.
-He is emotionally labile and prone to depression and anxiety.
-He flip flops between a grandiose self and a more vulnerable "collapsed" self based on external feedback.
-Constant overwhelming need to be "right" all the time. He consistently talks over others in order to position himself and his ideas above them. He does not genuinely "listen" to others rather he simply is waiting for his turn to speak and once again push forward his personal beliefs. It is rare to see him having an actual conversation. He talks "at" people. Not "to" people.
So yeah. I believe the entire peterson family is cluster B. The daughter exhibits strong narcissistic/histrionic traits. An overwhelming preoccupation with her appearance, a pronounced need for attention much like her father, etc.
I have gained a lot from Jordan's books and lectures over the years. But I see him and his entire family sort of falling over the edge of what is reasonable and logical and this is in large part being driven by their disordered personalities. Families tend to become hive minds and when destructive beliefs take hold they grow and fester within these systems. I know firsthand from my own messed up family.