It's an absolute nonsense. Russia tried its best to avoid a war in Ukraine for 8 years, there's absolutely no reason to go to Poland or any other NATO state. Just a reminder, that this war would never reignited if in January 2022 USA agreed to sign a document and guarantee that Ukraine won't join NATO and remain a neutral state. As to nuclear weapons, once again, you have no clue what you're talking about. If Russia's intention was to conquer Poland or whatever other country, nuclear and conventional strikes on Poland territory would've happened months ago, as it's a major logistics hub for all the weaponry that's pumped in Ukraine.