Perhaps but I would argue that the most likely reason is genetics plus traumatic childhood. Manson had traumatic childhood; living on the streets, committing crime and spending half of his life in prison and in state institutions. When you add drugs and hippie flower power music scene to that you get Manson.

Bundy also had traumatic childhood not knowing who his real father is and believing his mother is his older sister while being raised by his grandparents. He was violent sex addict always craving for more and more. Imo his genetics played the key part in his deviant violent behavior.