What Hitler's oratorical genius conjured into existence from the depths. What Osso Strasser was referring to when he said that Hitler was a "loud-speaker, proclaiming the most secret desires, the least admissible instincts, the sufferings and personal revolts of a whole nation".
The systematic manipulations of fears and hopes and cravings and anxieties and frustrations of the masses. 20 years before Madison Avenue and its motivational research which exploits the less dangerous dark forces to sell toothpaste, cars and political leaders. Using the dangerous ones Hitler sold the masses a Fuehrer, an insanity and a war.
As this is a family friendly site I will refrain from further elucidation except to say that what was exploited by Hitler was provided by the Treaty of Versailles in June 1919 and your President's capitulation to the vengeance seekers. With us it is self inflicted.