What are the great dictators of the world afraid of?

It is very strange that a person like Hitler who issued a slaughter order easily , would be afraid of dentistry. In a book published in 2009/1388 titled "The Devil's Dentist", wrote: Although he was suffering from a severe oral and dental problem, he was not ready to go under the hands of dental practitioners. He even told Mussolini one time ago that he was ready to lose some of his teeth, but not under the hands of dentists. More interestingly, Hermann Göring, too, was afraid that dentists would cry and cry before sitting on the chair.