Although I can't be sure, this sounds like the sort of thing that came out of Stalin's "Third Period." It is in line with a phrase that is more easy to track down: "After Hitler, us." The German CP was on an ultraleft binge in the 1920s. It regarded attacks on the German working-class as something almost to be welcomed, since it would wake it from its reformist slumber. The German CP also viewed the SP as "social fascists" and joined with the Nazis in a referendum to unseat the SP government in the state of Saxony.
Lenin's true views have nothing to do with this. He used to study Czarist legal codes late at night in order to discover some loophole that might aid workers struggles. He believed deeply in the need for reforms. Unlike the reformists, he thought that militant, working-class action was the only way to achieve reforms.