German middle-class liberals abandoned working-class revolutionaries in 1848

Evidence

Still, it was largely out of this middle class that early nineteenth-century liberalism and nationalism found their social base. Barraclough, indeed, expressed some surprise that “radical and national feeling” would persist so long in Germany as to achieve popular support in the German revolutions of 1848. Yet when crowds of artisans and workers rose in Vienna and Berlin in that year, the liberal elements of the middle classes were not enthusiastic, choosing politically to abdicate their momentary advantage rather than provide any further momentum to the revolutions. — Cedric J. Robinson, Black Marxism_ The Making of the Black…, 324