That is actually a myth.
Fear is an emotional state-a reaction to the presence or anticipation of something highly aversive. It is not an attempt at manipulation. If terrorists enter a bank and order everybody down on the floor, the people will exhibit fearful behavior.
If I then give a bank customer on the floor a compliment, 20 bucks, or chocolates, is this going to make them more afraid of terrorists next time? It is stunningly narcissistic to imagine that a dog's fearful behavior is somehow directed at us.