Compare it to blowing up a ghost town near Finland, then.

No one would be scared of a military managing to destroy something on their own soil.

In fact, a better theory for you would be to claim that Russia did it in order to make it look like sabotage from the EU/America. Just a propaganda exercise since the pipeline is “useless” to them right now in any case. But you are clearly so desperate that you just go for the first cartoonish theory that you can come up with.