The main point I was making is he stormed into Ukraine and annexed Crimea. The west did nothing. Now he's going for the rest of it.There's a bit of whataboutery in that question. It's pure speculation that he might ever want to go for e.g. Poland. And to anyone chiming in about his alleged "vision" for a rekindled grand USSR, assuming that is even true, then that may be an aspiration but it does not mean he is hell bent on it, nor that his views and actions might not be moderated by events.
Hard to imagine that the Ukraine situation is going remotely as he planned. And if taking Ukraine is met with this level of resistance and the enormous international reaction, the impact upon his economy, then you can times that by 10x if he went for Poland. He'd be mad to try this again.
If the hugely admirable resistance put up by the Ukrainians, and the significant arms we have provided, and the vast range of sanctions, are to have had any benefit, then IMO it is not that we will have prevented his successful taking of Ukraine. It is that he will think "Fuck, I am not doing THAT again".
We didn't bother when he installed a puppet government in Belarus. We didn't do anything about Chechnya. So when will do we do something ?