For the US: On February 28, Biden put sanctions on the owners of Nord 2. The owners filed for bankruptcy on March 1. For seven months before the explosion, the owners were in bankruptcy court and just got a extensions. Both Trump and Biden got what they wanted before the Nord lines were sabotaged. What the US does not want is damage to European energy security that could compromise support for the Ukraine.
For Germany: Nord 2 never delivered any natural gas and Nord 1 had decreasing deliveries before it stopped. Germany is getting long term contracts for natural gas with Qatar and other countries. When Russia offered gas through Nord 1, Germany refused. Germany is committed to not funding Russian wars. The winter is going to be hard on Europe, they will get through it. Europe are working to meet there energy needs, they are getting what they want.
For Russia: Gazprom is liable for billions of Euros for non delivery. As far are future European energy contracts are concerned, Nord 1 and 2 are redundant. Russia is not making any money on sales, the war cost future sales, and the investment in the lines is a waste. Russia has no political leverage over Europe. Putin is not getting what he wants and the Gazprom is liable for billions of Euros.
During the Cold War, Russia spent a lot on combat swimmers, miniature and mother submarines for espionage and sabotage. When you look at what matters to all sides, Russia has more reasons to damage is pipelines for political reasons than anyone else.
Facts or not, none of them, NONE, conclusively prove Russia blew up their own pipeline.
There is more ‘proofs and evidences’ that the US blew up/sabotaged the pipeline than there is even remotely indicating the Russians did it.
Please see video for some solid reasoning.