I very much sympathize and agree with your point about how the USA, given its history in global conflicts, should tread very carefully in this situation. On the other hand, I kinda feel like "really? of all the conflicts you've been involved in since WWII, this is when you've suddenly decided to grow a conscience???" (and when I say 'you' here, I mean a very vague gestures in the general direction of the USA, I know that american socialists have been opposed to all these illegitimate wars.)

But I don't really buy the overall narrative here. Looking at a source of the GDP of Ukraine that I found, the only dips are after the financial crisis, and after being invaded by Russia the first time. When did this supposed economic downturn due to NATO influence start? And if Ukraine has been selling out their economy for the hope of a NATO membership, why is no one coming to its aid? Seems like a bad precedence to set if the USA is indeed pressuring countries to join.

It seems to me like american socialists are so entrenched in the idea that american imperialism is to blame in global conflicts that it has become a self-evident truth, no further analysis needed. And any war that Russia starts is obviously a proxy war against the USA. I don't think this is the case anymore, and I think that the failure to recognize this, and incorporate it in their analysis, is what makes the DSA's response so lacklustre. (On the other hand, I don't know anything and no one should listen to me.)