There is reason other than the Soviets that prevented the communists to ally with the social-democrats in Germany: multiple deaths, smear campaigns, and genuine

There is reason other than the Soviets that prevented the communists to ally with the social-democrats in Germany: multiple deaths, smear campaigns, and genuine hatred. But other than that you're 100% correct, the Soviet stayed with republican Spain until the end despite POUM secession in Catalonia.