Since 2001, I've heard or read many conservatives express puzzlement over the tendency of American Jews to vote for Democrats instead of Republicans and perhaps one reason is the anti-Semitism promulgated by many conservatives since 1900.
The Liberty Lobby and the American Right (LLAR) documents some of the early conservatives/Fundies in the first half of 20th Century, including Father Denis Fahey, the author of
The Mystical Body of Christ in the Modern World (1935). Fahey considered Communism to be a plot of Jewish bankers and Marx an example of Jewish revolutionary messianism. (LLAR, p. 18)
Money Creators (1935) by Gertrude Coogan is not rabidly anti-Semitic only because she uses the code "international bankers" instead of Jewish bankers. In
Imperium (1949), Francis Parker Yockey adopted "an intense anti-Semitism which designated the Jew impersonally and symbolically as the agent of decomposition in modern civilization." (LLAR, p. 26) For Earnest Sevier Cox, all you need to know is the title of one of his books,
Teutonic Unity (1951). There are several others named in LLAR, including post-WW II H.L. Mencken.