via Winston Smith Ministry of Truth
The following is from "A Psychologial Profile of Adolph Hitler: His Life and Legend" by Walter C. Langer, Office of Strategic Services, Washington, D.C.
The OSS was the predecessor of the Central Intelligence Agency (CIA). The report was declassified in 1968.
Hitler As He Knows Himself
There are some people who seriously doubt that Johann Georg Hiedler was the father of Alois. Thyssen and Koehler, for example, claim that Chancellor Dollfuss had ordered the Austrian police to conduct a thorough investigation into the Hitler family. As a result of this investigation a secret document was prepared which proved that Maria Anna Schicklgruber was living in Vienna at the time she conceived. At that time she was employed as a servant in the home of Baron Rothschild. As soon as the family discovered her pregnancy she was sent back to her home in Spital where Alois was born. If it is true that one of the Rothschilds is the real father of Alois Hitler, it would make Adolph a quarter Jew. According to these sources, Adolph Hitler knew of the existence of this document and the incriminating evidence it contained. In order to obtain it he precipitated events in Austria and initiated the assassination of Dollfuss. According to this story, he failed to obtain the document at that time, since Dollfuss had secreted it and, had told Schuschnigg of its whereabouts so that in the event of his death the independence of Austria would remain assured. Several stories of this general character are in circulation.
Those who lend credence to this story point out several factors which seem to favor its plausibility:
(a) That it is unlikely that the miller's assistant in a small village in this district would have very much to leave in the form of a legacy.
(b) That it is strange that Johann Hiedler should not claim the boy until thirty-five years after he had married the mother and the mother had died.
(c) That if the legacy were left by Hiedler on the condition that Alois take his name, it would not have been possible for him to change it to Hitler.
(d) That the intelligence and behavior of Alois, as well as that of his two sons, is completely out of keeping with that usually found in Austrian peasant families. They point out that their ambitiousness and extraordinary political intuition is much more in harmony with the Rothschild tradition.
(e) That Alois Schicklgruber left his home village at an early age to seek his fortune in Vienna where his mother had worked
(f) That it would be peculiar for Alois Hitler, while working as a customs official in Braunau, should choose a Jew named Prinz, of Vienna, to act as Adolph's godfather unless he felt some kinship with the Jews himself. 
Other Articles of Interest:
- Adolf Hitler's DNA shows North African and Ashkenazi Jew ancestry
- Adolf Hitler's half-sister, Angela Hitler, was manager of Mensa Academia Judaica, a boarding house for Jewish students, in Vienna before WWII
- Leading Greek priest speaks out on national TV against "international Zionist conspiracy", says Hitler "an instrument of world Zionism"
- The myth of Adolf Hitler the 'brave WWI hero' - Hitler actually ridiculed and despised as a "rear area pig" by his regiment
- Adolf Hitler - A puppet of International Jewry tasked with the destruction of Germany