Hitler is a very remarkable man, a very able man... What Hitler should have done was not to drive the Jews out, what he ought to have said was, 'I will tolerate the Jews to any extent on condition that no Jew marries a Jewess, on condition that he marries a German.'
Source, in full
From a lecture before the Fabian Society in London called "The Politics of Unpolitical Animals" (23 November 1933), as cited in "Shaw Heaps Praise upon the Dictators: While Parliaments Get Nowhere, He Says, Mussolini and Stalin Do Things," New York Times (10 December 1933)