If Poland is blown, mark my word, Russia would behave same as Serbia is blow. Russia must. How so? Because nothing would be same thereafter. Because without Slavic Poland, Russia`s stomach is open. You may say its not sincere help. Sure. Its Geo-strategy. Ordinary Russians love Poles but emotions aside. In this game its only Geo-strategy.
Same way Poland must be aware that Russia such as it, hold balance in Europe so existence of Poland is possible. Vatican really don`t care for Poland, neither Germany, France or Britain. If up to them Poland is liability. Only fully germanised Poland would be suitable to them. Russia on the other side have its own selfish interests Poland to exist as Slavic.
So, whoever cause great devastation in Poland, no matter if Russia itself hit it in order to cleanse NATO`s nuclear silos in Poland or if NATO do it in case of Russia`s advance (if situation escalate), Russia would use its maximal nuclear force to cause even bigger degree of harm on western Europe, Britain and USA (if USA is involved but I doubt that).
Same goes for Ukraine. If its conventional conflict it won`t go nuclear. In conventional conflict Russia certainly wins. Russia would anyway win.
Russia?
If the6 did, their cvntry would be smoke and ash.
NATO can`t beat joint Russian and Chinese action. Its quite clear. And they know they are together in it or its the end for them, on the middle and long run. If come to that they would move to absolutely destroy western Europe and would give chance to USA to avoid destruction if possible and if enough reason. But western Europe is oblivion, nothing.
But NATO is aware of this. Its the only hope for Poland that NATO knows all this what I mentioned now.