Earlier quoted context omitted.
Russia would be insane (more than they already are) to attack that. It has nothing to do with Ukraine and would likely be considered an attack on a NATO ally. No benefit and lots to lose.
(Disclaimer up front: I don't know who cut NS1 and NS2, my bet is on russia, but I can see more than one alternative.) Which would explain the attacks on their own gas pipeline NS1 and NS2: - they are dumb and reckless enough to do that (they weren't used anyway, +plausible deniability) - it signals to NATO the idea that russia can destroy critical infrastructure without actually getting caught for an attack on criti…
Blowing them up did everyone, on both sides, a lot of favours by ending the whole will they / wont they charade that was taking place on both sides.