Putin doesn’t need that. He already won the election, can project actual power in Ukraine, already has the power to call up more troops, has a war already on the border making the Russian people fearful. What more could he gain?
RE: What more could he gain?
He needs more soldiers ( young men ) to throw into battle. I was in Eastern Europe last week and I saw a lot of Russian men who fled Russia to avoid conscription. What better way to justify conscription than to drum up patriotism?
Most of the world have been saying that Russia is the aggressor in this war and Ukraine is the victim. Well, a little terror attack will give Putin the propaganda tool to respond that this is not so. “I am protecting Russia from those Ukrainian terrorists”.
You can speculate and I can speculate.