On the contrary, sabotaging things that impact everyday life and give a generalized feeling of decline throughout society is water on the mills of Russia's allies in Europe, notably the nationalist and populist parties.
"Every bad thing that happens is the Russians" sounds very similar to "Every bad thing that happens is the Israelis." It's unhinged, Candice Ownens level nonsense.
So instead of doing this during a potential future war when it could be a strategic advantage, Russia is doing piecemeal attacks right now to show Europe where the weaknesses are and give them time to upgrade their defenses?
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But what's the incentive?