Excuse me - if Ukraine is using equipment abandoned by the Russians as they panic and run away that is NOT stealing.
Likewise, capturing enemy equipment after a battle is NOT stealing.
Ukraine has stolen NOTHING from Russia, whereas Russia has stolen land, lives, living children, and everything their soldiers could loot.
I would argue WWII might be an example. Certainly, the West didn’t object to the Soviets fighting the Nazis and it was awful bloody.