Why the Communist Party of Germany prioritized fighting socialists over the rising Nazi threat

Countries & Cities · Published 3 October 2026 Swipe more like this →

In short: Born from the chaos of World War I, the Communist Party of Germany became a major political force that eventually collapsed under the weight of Soviet influence and internal purges. Its obsession with labeling social democrats as fascists left it dangerously exposed when the Nazi regime seized power in 1933.

The Communist Party of Germany (KPD) emerged in late 1918 and early 1919 as a radical splinter from the Social Democratic Party. Led by figures like Rosa Luxemburg and Karl Liebknecht, the group sought a social revolution rather than the parliamentary democracy favored by their former colleagues. Following the failed Spartacist uprising of January 1919 and the subsequent murders of its key founders, the party underwent significant internal shifts. By the mid-1920s, under the leadership of Ernst Thälmann, the KPD became a staunchly Marxist-Leninist organization, increasingly funded and directed by the Comintern in Moscow.

During the Weimar Republic, the KPD maintained a consistent electoral presence, typically securing 10 to 15 percent of the vote. However, its strategy was heavily dictated by Stalinist doctrine. The party infamously adopted the 'social fascism' thesis, which categorized the Social Democratic Party as the primary enemy, arguing that social democracy was merely a façade for capitalism. This rigid ideological stance blinded the KPD to the existential danger posed by the Nazi Party. When Hitler rose to power in 1933, the KPD was swiftly banned, leading to mass arrests, executions, and the imprisonment of tens of thousands of its members in concentration camps.

The party's history in the Soviet Union was equally fraught. Many German communists fled to Moscow to escape Nazi persecution, only to face the Stalinist terror. Records indicate that a higher proportion of the KPD's Politburo members perished in the Soviet Union than at the hands of the Nazis. Following the Second World War, the KPD was revived in the Soviet occupation zone, where it was eventually forced to merge with the Social Democratic Party to create the Socialist Unity Party, which governed East Germany for decades. In West Germany, the party remained active until 1956, when it was banned by the Federal Constitutional Court for its extremist activities.

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