>>2124997 (lb)
I heard of this particular phenomenon/manipulation technique [emotional contagion] on the Paul McGuire show. He is an author, pastor, radio host and former commentator on CNN (years ago). He has an excellent video on the illuminati/NWO where he delivers a speech at a conference.
On one of his radio programs he talks about emotional contagion as a brainwashing tool and describes it like a fast moving virus thru media/social media that can affect a large population quickly leading to a revolutionary movement (such as Arab Spring/Winter). Hear The Paul McGuire Report 12/08/17 "Emotional Contagion: What Was I Thinking?" - starting around the 30 minute mark. https://www.youtube.com/watch?v=oIkUPaPhQNI