“Communism. Jewry. I am a German Communist.”

Der Weg, den Adolf Hitler zur Rettung des deutschen Volkes zu gehen sich entschlossen hatte, führte nach innen und nach außen. Nach innen überwand er die Machtpositionen des Juden durch Ausrottung des Marxismus und durch die Vernichtung der Geheimbünde. Damit wurden die Hemmnisse weggeräumt, die der Schaffung einer deutschen Volksgemeinschaft entgegenstanden. Nach außen zerbrach er die Sklavenketten von Versailles durch Wiederherstellung des Volksheeres, Heimholung der aus dem Reichsverband gerissenen Volksteile, Niederzwingung der Großvasallen des Weltjuden und Grundsteinlegung eines von der jüdischen Geldmacht befreiten Europas.
Stürmer, August 22, 1940

As quoted in the Evening Herald in Dublin, Ireland (February 3, 1948), reprinted in Economic Council Letter, Issue 278, Part 397 (1952), p. 1807 https://books.google.com/books?id=qtAeAQAAMAAJ&focus=searchwithinvolume&q=first+rate+Fabian
1940s and later

Reported by Paul Scott in the Lewiston Daily Sun (27 September 1972) again as remarks at Duke University; http://news.google.com/newspapers?id=FXwgAAAAIBAJ&sjid=7mcFAAAAIBAJ&pg=1010,3814989 reported elsewhere as a remark made at Michigan State University (22 November 1970) and cited to the Detroit Free Press but without a date, page or headline.
Rick Perlstein, in a 2005 London Review of Books article and in his 2008 book Nixonland: The Rise of a President and the Fracturing of America (Simon and Schuster, p517 http://books.google.com/books?id=dM_enWzoghoC&pg=PA517#v=onepage&q&f=false), accused Helms of inventing the quote: "They tapped their network of friendly media propagandists, like the future Senator Jesse Helms, then a TV editorialist, who supplied an invented quotation that still circulates as part of the Fonda cult’s liturgy." http://www.lrb.co.uk/v27/n22/rick-perlstein/operation-barbarella The COINTELPRO Papers (2002) documents a separate attempt to plant false quotes from Fonda in the press.
Disputed

Source: Killing History: The False Left-Right Political Spectrum and the Battle between the ‘Free Left’ and the ‘Statist Left', (2019), p. 333

Source: Tortured For Christ (1967), p. 75.

Reported by Representative Martin Dies as having been said in a conversation at the White House, in the Congressional Record (September 22, 1950), vol. 96, Appendix, p. A6832. Reported as "exceedingly dubious" in Paul F. Boller, Jr., Quotemanship: The Use and Abuse of Quotations for Polemical and Other Purposes, chapter 8, p. 361 (1967); Boller goes on to say that "it is most unlikely that FDR would have said anything like it, even flippantly, to the zealous HUAC chairman, though he may have told Dies that he was exaggerating the size of the American communist movement".
Misattributed

Quoted in Asiaweek, Vol. 5 (1979), p. 28.

To Leon Goldensohn (28 May 1946)
The Nuremberg Interviews (2004)