" Conspiracy theories explaining the Bolshevik victory gained widespread credence: the most popular of these was that of international Jewish conspiracy, since Trotsky, Zinoviev, and a number of other Bolshevik leaders were Jewish; but another theory, revived in Solzhenitsyn's Lenin in Zurich, pictured the Bolsheviks as pawns of the Germans in a successful plot to take Russia out of the war. (...) the attitudes that
enabled such theories to flourish may also have influenced Western scholarly approaches to the problem. "
― Sheila Fitzpatrick , The Russian Revolution 1917-1932