Churchill made the claim in an article entitled "How The Jews Can Combat Persecution" written in 1937, three years before he started leading the country.

He outlined a new wave of anti-Semitism sweeping across Europe and the United States, which was followed by the deaths of millions of Jews in the Holocaust under the German Nazi regime.

"It would be easy to ascribe it to the wickedness of the persecutors, but that does not fit all the facts," the article read.

"It exists even in lands, like Great Britain and the United States, where Jew and Gentile are equal in the eyes of the law and where large numbers of Jews have found not only asylum, but opportunity.

"These facts must be faced in any analysis of anti-Semitism. They should be pondered especially by the Jews themselves.

"For it may be that, unwittingly, they are inviting persecution -- that they have been partly responsible for the antagonism from which they suffer."

The article adds: "The central fact which dominates the relations of Jew and non-Jew is that the Jew is 'different'.

"He looks different. He thinks differently. He has a different tradition and background. He refuses to be absorbed."

Elsewhere, Churchill praised Jews as "sober, industrious, law-abiding" and urged Britons to stand up for the race against persecution.

"There is no virtue in a tame acquiescence in evil. To protest against cruelty and wrong, and to strive to end them, is the mark of a man," he wrote.

The article was discovered by Cambridge University historian Richard Toye in the university's archive of Churchill's papers.

At the time, Churchill's secretary advised him it would be "inadvisable" to publish it and it never saw the light of day.