let us enter Poland and we will deploy nuclear missiles in Poland...
What will we do with Poland, once we "have" it?
In Russian, there is a phrase - «чемодан без ручки» - or a "suitcase without a handle". That's what Poland would be for us.
Torn away from the Brussels teat, from their familiar markets, and established industrial cooperations - Poland will be ours to feed. How will you feed 38 million of them?
By taking from Russians, and giving to Poles? We already had such geniuses - like Stalin - that sent resources to our "socialist brothers" even as Russians starved to death.
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I think if invading Poland is a discussion people want to have - then it has to be pragmatic. You have to answer the three questions:
1) Why?
2) How?
3) Will we be able to keep it?
4) What benefit accrues to Russia and Russians at large?