The power of Juche had not yet broken the seals on Marx's forbidden treatises on proletarian necromancy, and so a devastated and exhausted USSR was forced to relent for the time being.
Being the first socialist experiment made things a lot harder. The socialist world hadn't yet developed the Cuban moral vest, the Laotian cloak of invisibility and forgetting, The Vietnamese power of turning into killer trees, or the Chinese power to get stronger every time it collapses. All they had was tactical deployments of Stalin to devour the enemy's granaries in single fell swoops of the man-sized steel spoon from which he took his name.