It's not a coincidence. You're likely to see very similar traits in most if not all psychopaths.
The way they gain access to victims is by morphing into whatever seems perfect for the person they're targeting. If the target is religious, the psychopath becomes the most pious; if the target is family oriented with kids, the psychopath becomes all about play dates and parenting manuals; if the target loves dogs, the psychopath will procure the perfect breed, attend every training class they can locate, and know every dog park in town. (With Bundy, because he wasn't able to read his victims in the mere moments he knew them before abducting them he instead assumed a vulnerable role preying on his victim's compassion.)
They all treat relationships in the same manner. Every relationship they meet their target and idealize all their target's best traits...instead of being smart, you're a genius; instead of pretty, you're gorgeous; instead of compassionate, you're Mother Theresa. Then they realize you aren't as perfect as they thought, because in reality no human being ever could be, and they start to devalue all the things that they believed made you so awesome. Lastly, if you're lucky, they discard you like yesterday's trash.
In my experience if you have the audacity to leave them instead you're opening yourself up for a scenario of nightmarish proportions. Psychopaths don't often willingly let their targets go unless they've secured a new victim. They'll sink to almost any depth, even years later, in an attempt to punish their initial target. Rejection is the ultimate sin in their world. It must be avenged.
JMO
