As you may know, I am a student of body language, aka nonverbal communication. I've been fascinated by Trump's use of certain gestures, and this video explains their meaning and function. At root, he has hypnotized a great number of people and most likely he did it with these gestures, not with the stunning illogic of his words.

http://www.cnn.com/2017/05/12/opinions/hand-gestures-matter-for-presidents-van-edwards-opinion/index.html