Killing his family and making it look like a disappearance was CW trying to create a narrative where he is the victim. He couldn't stand the idea of being seen as a cheater and a liar who would divorce his pregnant wife. With the missing family story, he gets family and friends calling and saying "oh, Chris you poor thing, you must be worried" and all that kind of sympathy.
He was able to kill them all because he got no narcissistic supply from them anymore. He complained about the girls throwing pizza at him and crying for their mother on Skype and copying their mothers insults towards him. A normal parent wouldn't take such things so personally but if he's a narcissist, this cuts deep. He decided at a certain point he had no use for them because they didn't think he was a "good boy" or a "rain man" or "the sexy guy who was good in bed".
I mean, SW on some level still felt those things but he chose to ignore that and ignore her heartfelt letter. Cheaters have to convince themselves their partner deserves it so they can cheat with less of a nagging conscience. They'll often filter out the good things the partner does and amplify and twist their every mistake and flaw. They'll pick fights to give themself an excuse to leave the house and visit their mistress or to make the spouse the villain instead of themself. I've been there.
Point is, his coworkers, parents, sister, friends, NK etc still matter because they feed his need to be the smart guy, the nice guy, the hot guy, the hero. In CW's world, the ability of a person to feed his ego is their sole value. With no one to build them up, a narcissist is forced to face the disappointment they see in the mirror.
Of course I'm not a professional, I am just going off my experiences and what I've read about narcissists.
He was able to kill them all because he got no narcissistic supply from them anymore. He complained about the girls throwing pizza at him and crying for their mother on Skype and copying their mothers insults towards him. A normal parent wouldn't take such things so personally but if he's a narcissist, this cuts deep. He decided at a certain point he had no use for them because they didn't think he was a "good boy" or a "rain man" or "the sexy guy who was good in bed".
I mean, SW on some level still felt those things but he chose to ignore that and ignore her heartfelt letter. Cheaters have to convince themselves their partner deserves it so they can cheat with less of a nagging conscience. They'll often filter out the good things the partner does and amplify and twist their every mistake and flaw. They'll pick fights to give themself an excuse to leave the house and visit their mistress or to make the spouse the villain instead of themself. I've been there.
Point is, his coworkers, parents, sister, friends, NK etc still matter because they feed his need to be the smart guy, the nice guy, the hot guy, the hero. In CW's world, the ability of a person to feed his ego is their sole value. With no one to build them up, a narcissist is forced to face the disappointment they see in the mirror.
Of course I'm not a professional, I am just going off my experiences and what I've read about narcissists.