Ok Here's the thing. Obama and Hitler, no similarity, absolutely none. Obama has worked strictly within the framework of the US political system, Hitler was never elected to office, he seized power. He had nothing but contempt for democracy and wasn't afraid to say so. He was an unrepentant racist who believed in all manner of pseudo-science and crackpot theories to back up his bizarre beliefs. He as also full of hate and anger. Many Germans at the time were angry as well, angry at their defeat, angry to see their economy in the toilet, and were looking for someone to blame for their misfortune.
Since we are the topic of fascism, the Italian author Umberto Eco, in his 1995 essay "Eternal Fascism", lists the general properties of fascist ideology. He argues that it is not possible to organize these into a coherent system, but that "it is enough that one of them be present to allow fascism to coagulate around it". He uses the term "Ur-fascism" as a generic description of different historical forms of fascism.
(1) "The Cult of Tradition", combining cultural syncretism with a rejection of modernism.
(2) "The Cult of Action for Action's Sake", which dictates that action is of value in itself, and should be taken without intellectual reflection. This, says Eco, is connected with anti-intellectualism and irrationalism, and often manifests in attacks on modern culture and science.
(3) "Disagreement Is Treason" - fascism devalues intellectual discourse and critical reasoning as barriers to action.
(4) "Fear of Difference", which fascism seeks to exploit and exacerbate, often in the form of racism or an appeal against foreigners and immigrants.
(5) "Appeal to a Frustrated Middle Class", fearing economic pressure from the demands and aspirations of lower social groups.
(6) "Obsession with a Plot" and the hyping-up of an enemy threat; This often involves an appeal to xenophobia (such as the German elite's 'fear'of the 1930s Jewish populace's businesses and well-doings, see also anti-Semitism) with an identification of their being an internal security threat: He also cites Pat Robertson's book The New World Order as a prominent example of a plot obsession.
(7) "Pacifism is Trafficking with the Enemy" because "Life is Permanent Warfare" - there must always be an enemy to fight; Both fascist Germany under Hitler and Italy under Mussolini worked first to organize and clean up their respective countries and then build the war machines that they later intended to and did use, despite Germany being under restrictions of the Versailles treaty to NOT build a military force. This principle leads to a fundamental contradiction within fascism: the incompatibility of ultimate triumph with perpetual war.
(8) "Contempt for the Weak" - although a fascist society is elitist, everybody in the society is educated to become a hero; for example: the 1930s Germans, especially Hitler labeled Jews inferior humans thus weak as well as the physically disabled, the mentally retarded and mentally ill as weak—thus these "weak" or unwanteds were eliminated (executed) or "exterminated" (the Jews, or even Germans with disabilities).
(9) "Selective Populism" - the People have a common will, which is not delegated but directed by a dictator; This casts doubt upon a democratic institution, because the leader and government "no longer represent the Voice of the People".
(10) "Newspeak" - fascism employs and promotes an impoverished vocabulary in order to limit critical reasoning.
Listen to Trump how many these apply to him and what he stands for? I count at least 6