It's only Russia threatening nuclear war. No one else is discussing it. You don't give into blackmail. If the benefit outweighed the risks for Putin using nuclear weapons he would have used them. But they won't win his failed war for him and they'll represent his demise. The nuclear talk only scare feeble minds.
Since Putin won't end his war, that being the priority, then then next best option is to support Ukraine to end Putin's war for him.
