There is no such thing as "war in return", only global nuclear annihilation - if war in return was a possibility, EU armies would already be engaging Russia in Ukraine.
There is "war in return". It is far from certain that Putin is willing to start nuclear war. In my view, it is unlikely that he would use nuclear weapons. And if he is willing to use them he will use them because he is loosing in Ukraine, without regard as to why is he loosing in Ukraine.
