Memes

Class Consciousness was indeed high in Russia prior to the revolution. The Tsar was increasingly unpopular, as was the Provisional Government. Workers were already organizing into Soviets before the revolution, indicating a high level of importance on labor organization. The Bolsheviks prevailed because they were correct, and thus earned the support of the Working Class.

Further, the Soviets were not trying to lead the Spanish Civil War. The fact that groups sympathetic to the Soviets emerged isn't a sign of the Soviet Union forcing the Spanish to adopt their line, but a natural element of leftist organizing, there are going to be Marxists and those sympathetic to Marxist states. The Soviet Union above all wanted to fight off the Spanish fascists, which is why they got involved in the first place, not a grand scheme to sabotage the Anarchists.