Let me begin by stating that if the United States were ever invaded, I would do everything in my power to defend it. I still believe in the values upon which America was founded, and I marvel at the brilliance behind the Constitution. I love my country.
If we are citing "realpolitik", it is natural (but short-sighted) for the US to support a proxy war between Ukraine and Russia. As Mearsheimer wrote, pushing Russia towards China is unwise from that perspective.
Who is driving Western policy? The last two years fit the pattern of throwing wrenches into the gears of commerce to reduce fossil fuel use, while maintaining plausible deniability.