After the dissolution of the Kremsier Parliament on 7 March 1849, Fischhof was arrested, accused of rebellion and high treason, but was acquitted after an imprisonment of 9 months.

With Joseph Unger, later a member of the Austrian cabinet, he published in 1861 a pamphlet entitled "Lösung der Ungarischen Frage", in which he called for the division of the empire into Austria and Hungary.

This, he believed, would ultimately lead to German or Russian domination over the small nationalities in Central Europe and end the relative freedom they enjoyed under Habsburg rule.

After the collapse of German Liberalism in 1879 and the coming to power of a clerical-conservative government that could count on Slav support, Fischhof, in the conjunction with Ernst Baron Walterskirchen, planned in 1882 the foundation of a German-Austrian people's party.

Unlike Fischhof most middle class Jews supported mainstream German-Liberalism well into the 1880s, when it had long proven to be unable to stop the radicalization of Austrian politics and the growing anti-semitism that was part of this.