My general theory is that yes this was true for the Cold War era when there was a “trilateral” system of the USA with arms in Europe (what eventually became the EU) and East Asia (Japan, SK, Taiwan, etc) against the communist bloc. But since the 2000s, right before the GFC the EU was getting to be as big GDP as the USA and turning into a serious competitor and with more viable productive industry. Ever since then, I think US policy has been to harm the EU more and more. The US wants subservient allies, not self-sufficient ones. Alienating EU’s energy ties to Russia has been more damaging to European industry than to Russia thus far. And as far as I can tell US oligarchs mainly care about the Ukraine because of the agricultural potential of that land and the US policy of controlling world food supplies. Supposedly some millions of hectares of Ukrainian land have already ended up owned by various Western companies like Cargill or Bayer (not sure if this has been proven but I’d not be surprised).