Abuse seen as "a labor of love" - a new take on the Milgram experiments

I wrote about the Milgram experiments in reference to why people engaged in Flirty Fishing in the COG here.  

This speaker talks about revisiting those experiments and coming to a slightly different conclusion - one that is even more terrifying - people harm others when they believe they are doing it for love. Shades of the Manson Family killings.