No, because they are greedy (they also have good relations, but one thing breeds the other and it becomes circular logic). If you want to buy shit from Europe, for example, you would consider arming them with weapons (if there is any threat whatsoever). Cos you know, the best deterrent from war is having nukes and a standing army powerful enough so it isn't "worth it" to attack to gain an economical benefit. People rarely do good things' cos they themselves are good (although it happens obv), instead they do it cos it's worth it (or perceived to be worth it anyway).
Also, human motivations are complex, so US could be "partly" doing it believing it is ultimately the right thing to do, is it 0.0001% of motivation or 40%,who the fuck knows(probably mainly greed though).