Also also, what greater threat to european peace and stability is there than a bunch of former allies, who are battle-hardened, traumatized, right next to EU borders and are feeling betrayed by their ‘western partners’?

Assuming you’re talking about the Ukrainian people in some kind of Guerilla warfare, I think they’d be more likely to focus their efforts on Russia (the ones that actually did the attacking, raping, and bombing) vs the west that just “didn’t do enough”