The Russia-owned pipeline is at the centre of a disagreement between Germany and the US, which sees the project as a way for Moscow to increase leverage in Europe.
Long story short the US wants to sell Germany LNG at a much higher price and is pissed at Russia because of the pipeline can supply Germany with a reliable source at a much cheaper price. The US is a failing nation trying to bully its way back to power. Same reason they are trying to start a war between the Ukraine and Russia