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A politician is not allowed to get too emotional in public, so what he does is drop subtle hints that, over time, cause the public to get emotional. Once the same emotions are generated by enough people, the politician can use it to steer the public in his desired direction. Fear is an emotion that is often used this way. A smart politician knows that if he can create fear in enough people, those people will give up what they truly want in order to give the politician what he says they need.
