That is not the case. The initial Western reaction in the weeks after the event was:

- Russia did it as a false flag operation to sow distrust between NATO members.

- Russia did it because the long term contracts for Nordstream 1 required them to supply cheap gas, whereas they'd get market prices for the remaining pipeline of Nordstream 2.

It is remarkable that all Western agencies have backed off from both claims.

Initial reaction (of course only one side always has to source their assertions, while the people calling for a nuclear retaliation do not):

https://www.reuters.com/world/europe/qa-nord-stream-gas-sabo...

Plenty of people claiming that Russia did it.

Sure, initial reactions were all over the place.

But that doesn't detract from what I wrote.

It's not "clearly" against Russian interests given that Russia was already withholding supply with a myriad of various transparent excuses at the time, and using their German-based but Russian-owned companies to prevent Germany from stockpiling natural gas (they owned the storage), which ultimately resulted in Germany nationalizing those companies.