Christopher Jon Bjerknes
A substantial portion of this fifth edition has been translated to English by Alexander Jacob as Eugen Dühring on the Jews, Nineteen Eighty Four Press, Brighton, England, (1997). I have seen online versions of it for free but could not track one down today. The ISBN is: 0-906879-31-0.
The German fourth edition of 1892 is also available online for free:
Dühring reads as if he had written his book to answer the Jewish problem we face in America today. The Jews had taken over the German press, theater, opera, government, universities, etc. Dühring spoke out against Marx and Engels and the Jewish Communists' takeover of the Universities in Germany in his book Kritische Geschichte der Nationaloekonomie und des Socialismus, Fues's Verlag, (1879); which is available online for free: