Furr has been described by historians John Earl Haynes and Harvey Klehr as a historical revisionist , who , according to Cathy Young , was " a ' revisionist ' on a career-long quest to exonerate Stalin " . Furr believes that the Katyn massacre was not committed by the NKVD . He has also claimed that the Soviet Union 's occupation of Poland in 1939 did not constitute an invasion , and that the defendants of the Moscow Trials were guilty
Katyn massacre
Katyn massacre
Grover Furr