Everyone seems to know it was Russia and is just casting out ideas to find a plausible motivation. I find that completely baffling. For opportunity, consider that while setting up the pipeline needs a weird high-pressure residence and special training, blowing it up takes a fishing boat, scuba gear and underwater explosives. The equipment and training is cheap and available. So, those with opportunity is almost anyon…
I agree with you, it generally makes absolutely no sense for Russia to be behind this (at least not the mainstream Russian state, I have my doubts about their internal unity). What's more, I find the timing of this incident odd, having happened just after the victory in the Italian elections of the far-right, who is somewhat ambivalent towards Putin. The only conceivable motivation I can come up with for Russia would…
Damaging one pipe of NS2 makes it seem less obvious.