Earlier quoted context omitted.
Why would the US do that?
Because it cuts a huge temptation for Germans to find some compromise with Russia and allows them to sell LNG for huge profits?
Gigantic risk for the US and would eventually be found out which would destroy any semblance of relations with the EU and significantly strengthen Russia's hand.
US companies (and others) are going to sell LNG to Europe for huge profits anyway.
These pipelines weren't deliving gas anyway
The US would prefer energy markets to be stable and not have sky-high prices
Russia's invasion of Ukraine was one of the greatest foreign policy gifts in United States history and it significantly strengthened US alliances across the globe and put the entire west in lockstep with each other with regards to Russia and China. Placing that gift at risk is beyond foolish.