Almost doesn't matter if we did the NS2 and NS1 or not, whether we did it ourselves or by proxy. The evidence, so far, is damning.
January 2022 Victoria Nuland, same warhawk neocon who called for regime change against Saddam Hussain, said that the US would stop NS2 if Russia invaded Ukraine.
February 2022 Bidan said we would stop the NS2 if Russia rolled tanks and troops into Ukraine.
June 2022 NATO and the USS Kearsage participated in BALTOPS 22 right in the vicinity of the sabotage.
USS Kearsage and a helo carried by the Kearsage in flight data over the area of the sabotage.
Two reasonable conclusions
The US blew up the NS1 & 2.
Another state actor blew up the NS1 & 2, and has a ton of credible evidence that the US did it.
This is more than industrial sabotage.
This is more than an environmental catastrophe (lng is like 90% methane, the globohomo's culprit for global warming [cow burps]).
This is an act of war, and that is what Russia will be screaming in the UN Security Council.