Many GSC readers will be familiar with Steven Hassan's name and anti-cult message.
This TED talk by Hassan is poignant (and has been for more than 40 years) and is salient today. It's less than 14 minutes long. The concept is far from limited to religion (including fundamentalist groups like twi) or politics. Hassan cites other ways people might be subject to this kind of mental/emotional manipulation.
BTW, all humans are subject to being conned. I have been and not only by Victor Wierwille or Loy Martindale.