Complex sentence: Unlike the prior German nationalism of 1848 that was based upon liberal values, the German nationalism utilized by supporters of the German Empire was based upon Prussian authoritarianism, and was conservative, reactionary, anti-Catholic, anti-liberal and anti-socialist in nature.
Split into simpler sentences: Unlike the prior German nationalism of 1848 that was based upon liberal values, the German nationalism utilized by supporters of the German Empire was based upon Prussian authoritarianism. It was conservative, reactionary, anti-Catholic, anti-liberal and anti-socialist in nature.