Why did liberals distrust Franz Joseph after 1851?

Liberals developed a permanent distrust of Franz Joseph primarily due to his government's decision in 1851 to withdraw the promise of a constitution that had been granted in 1849 under the pressure of revolutionary unrest.1

This action was a defining feature of the era of neo-absolutism, during which the emperor and his advisers, such as Felix, prince zu Schwarzenberg and Alexander, Freiherr von Bach, maintained a regime characterized by harsh rule, the abandonment of press freedom and public trials, and the implementation of an intolerant police apparatus. The government's reliance on internal surveillance and the restoration of corporal punishment further alienated liberal reformers, leading to a climate of deep-seated resentment toward the emperor's personal rule.12