Ok.
I can't speak for YUPPIE for I don't think they were talking about going easy on Russia. I think they were just saying war crimes shouldn't be tolerated against the likes of Russia.
I don't think terms of WW2 apply to this war because even though the Allies were the good guys they were fighting on the offensive. Much easier to force a nation into an unconditional when you are on their doorstep and bombed their capital to rubble. Unfortunately Russia could just decide to walk away. Theres only so much the international community can do to them that hasn't already been done. No one is marching on Moscow. Any upheaval of Putin and the oligarchs will have to be from the inside. No occupation while the fascists stank is cleared out.
The plus is no one will feel obligated to help Russia out of its financial hole. Just need to find enough energy alternatives.