Why did Otto von Bismarck call the Centre Party and Social Democratic Party enemies of the empire?

Otto von Bismarck labeled the Centre Party and the Social Democratic Party as enemies of the empire (Reichsfeinde) because he believed they rejected his specific vision for a united Germany. Bismarck maintained that every political system required an enemy to define itself against, and he viewed these groups as fundamental threats to the stability and character of the German Empire.12

• The Centre Party: Bismarck viewed this party as a threat because it represented the interests of Roman Catholics, who constituted a significant minority in Germany. He perceived the empire as inherently Protestant and feared the influence of a clerical party that he believed was too centralized and potentially disloyal to the state's authority. This tension led to the Kulturkampf, a state-led campaign to limit the church's power.1
• The Social Democratic Party: Bismarck held an uncompromising hatred for socialists, whom he viewed as a grave social peril and a threat to the capitalist character of the empire. He frequently used inflammatory rhetoric, labeling them enemies bent on destruction, and utilized assassination attempts against William I to justify banning the party in 1878.12