I mean, on one hand, yes, but also I reckon the conflict between German and Italian imperialism vs the proxy forces backed by Russia can accurately be described as an inter-imperialist conflict, innit? Anyway, I mostly brought it up because of the bit
Serge Forward asked, about "Weapons supplied by whom? Arms dealers we've spent years opposing?... The British Army?", cos if we wake up tomorrow and this has all been a dream and we're actually living in 1936, then those same questions can be asked of anyone demanding arms for Spain, so I'm not convinced that they're an automatic knockout. Although it is certainly worth asking critical questions about who's supplying arms and why they're doing it and what they're asking for in exchange.
But thinking about Spain, and
the WWII stuff raised by
Rob Ray over on another thread, is maybe useful, cos there the class war was... not identical to the military struggle, existing alongside it at some points, in contradiction to it at others. And maybe it's a softer, more limited principle than NWBTCW, but something I take from that is the importance of rejecting like national unity popular front-type blackmail, which I don't think means being indifferent to how the war turns out?
So like in Spain, I think the "correct" position was to support the military antifascist struggle, while also supporting all the collectivisations and stuff that was denounced as undermining that struggle. On WWII, I've never been 100% confident what the official correct internationalist line is meant to be, but personally I am very very glad the nazis did not win the war, while also thinking the people who carried on class struggle in the Allied countries were more right than the people who wanted to put everything on hold for the war effort and denounced them as undermining the war.
What does that mean today? In the UK it's pretty simple, I don't think anyone except maybe Paul Mason suggests putting social struggle on hold for the duration of the war. The only thing I've seen that comes close is
when the TUC cancelled the tory conference demo, but it turns out that apparently they weren't actually doing it because of national unity but cos they're shit at organising.
In the Ukraine - hard to say, it would be useful to have more Ukrainian voices involved! I suppose my rough sketch is something like support for looting, opposing conscription and the ban on men leaving the country, opposing the ban on opposition parties (too much opposition in this sentence!),
definitely opposing the changes to labour laws and so on... but, I think you can take all those positions, while also "supporting"* the military resistance against the invasion.
*and yes, obviously there's also questions to be asked about what "supporting" means and how/whether it can be meaningfully put into practice.