I liked the simple rationale of Tucker Carlson last night which was basically who stood to benefit/gain the most from the pipelines being taken out...was a good watch last night, for sure.
One scenario suspects that the U.S. reconsidered their threat to eliminate Nordstream as Biden and Nuland professed.
To do so puts any and all European countries in dire straits this winter, alienating any allies remaining there, and further damages a clean energy religion and simultaneously reignites fossil fuel production-—the latter perhaps a greater dread than saving peoples lives.