In 1940 John F. Kennedy wrote of the 1930s stating:
"During this period, the fear of Communism, not of Nazism, was the great British bogey. Germany, under Hitler, with its early program of vigorous opposition to Communism, was looked on as a bulwark against the spread of the doctrine through Europe."
Kennedy was aware of this view because his father Joseph Kennedy was the American Ambassador to Britain and shared the British sentiment, along with many other British and Americans, who all helped the fascists to power prior to the start of World War II.
Winston Churchill also gave support to the Nazis and other fascists prior to the outbreak of World War II. This was for the same reason that some Americans did, because they were anti-communist and anti-Semitic, and viewed the Socialist Revolution as a global Jewish conspiracy. In 1920 Winston Churchill wrote Zionism versus Bolshevism, which was an attack on international liberalism and its ties to the Jewish community. Out of these anti-liberal views and misconceptions about some of the objectives of social revolution anti-Semitism grew in the west and helped to support Hitler and the Nazis in their buildup of the Nazi Empire.
Zionism and Bolshevism can be seen here:
http://www.fpp.co.uk/bookchapters/WSC/WSCwrote1920.html