But in the case that _they_ planted the sabotage device, what does this do for them politically?
* disabling Nord Stream I gets Gazprom off the hook for failing to deliver gas to customers in Europe through force majeure
* Leaving one pipeline of Nord Stream II intact left a door open for Germany to get gas in exchange for ending support for Ukraine
* it's a not so subtle message to Nato that Russia sees the Baltic as their lake, and underwater resources are not safe
* planting disinformation about "who really did the deed" was used to sow discord among the de facto allies of Ukraine.
But in the case that _they_ planted the sabotage device, what does this do for them politically?