asicaly no leftist said "Russia should invade" before it happened. But it happened and now supporting the defeat of your own imperialist bloc (the largest and worse one) aka Nato/US etc and also supporting the way the war ends the fastest (Russian victory and immediate Ukraine surrender negotiations ) are legit positions both from a revolutionary defeatist mindset and from a pragmatic one. Also for various geopolitical reasons Russia collapsing, losing or coming out much weaker of this is bad news for actual AES (even the uncontroversial ones like Cuba and Bolivia) and for any chances new ones would have