The industrialists decided that if they were to help modernise the Soviet army the German Communist party (KPD) must never again vote with its sister left-wing party, the German Social Democratic party (SPD).
Krupp’s terms were a bitter pill for Stalin but eventually he capitulated. …
on 1 September 1928, at the Sixth Annual Congress of the Comintern, the Soviets used the cloak of universality to denounce the German Social Democratic party, refusing to allow the German Communist party to vote with the SPD any more. p.140
Accordingly, instead of linking hands with the SPD on May Day in 1929, the German Communists staged an aggressive demonstration. Seven people died and more than 100 were killed in the bloodshed. p.152
In June 1929, October 1929 and July 1930 the Communists voted with Hitler’s NSDAP and Hugenberg’s DNVP instead of with the Social Democrats.
They (the Communists) secured a huge increase in votes in the September 1930 elections, almost entirely at the Social Democrats expense, by alleging that the ‘treacherous, corrupt’ Social Democrats were the ‘conscious agents of French and Polish imperialism’ because they supported paying reparations.
On 11 June 1931 the Communists joined forces again with Hitler and Hgenberg’s parties in an unsuccessful attempt to reconvene the Reichstag so that they could air their views against Germany paying any more reparations.
Hugenberg’s DNVP, Hitler’s NSDAP and the Stahlhelm were joined by the Communists in an ‘unnatural alliance’ to bring down the Prussian government. The local Communist party had been loath to join Hugenberg and Hitler’s initiative … However, Stalin still needed German industrial aid and expertise. So he and Molotov personally intervened to persuade the Communists to support the Right p.200
In May 1932 Communists, the German Nationalists and National Socialists proposed a motion of no confidence in Brüning’s entire cabinet.
The Lausanne (war reparations) Conference finished on 9 July 1932. The Reichstag elections took place three weeks later. … Hitler drew a terrifying picture of the spread of Communism. … However, they (the German voters) were completely duped when they imagined that the Social Democrats and the Communists would combine to undermine German democracy. (for) ‘At Moscow’s order, the German Communist party pronounced the Social Democrats ‘enemy no.1’, … split the vote of democratic and socialist forces, and contributed to Hitler’s triumph at the polls’.