Ukraine Crisis What do you guys think of the escalation of nuclear threats from Russia?
Initially, Russia must have known it faced military calamity if other nations intervened directly in Ukraine. It effectively used nuclear threats to deter this. But, it did not include mere armament in it's threat: perhaps it feared the west would arm Ukraine anyway.
But now, Russia must realize that any kind of victory might be impossible if arms continue to follow more or less freely into Ukraine. And so, it has extended it's nuclear threats to include armament.
First, I think it is important to note that there is a subtle but important difference between warning against something an adversary has not yet done, versus warning against something an adversary is currently doing. In the latter case, if the adversary continues to do it, there is still room to manouver: you can issue more furious threats, and maintain some credibility. Whereas in the first case, if you draw the line first, then the adversary crosses it anyway, more threats strike of impotence: the choice becomes escalation or humiliation.
Second, what is the rational response to such threats? The stakes seem excessively high: is it rational to back down in the face of such threats, and leave Ukraine to it's fate? After all, MAD only works with rational actors, this is far from guaranteed when the decision maker is an (aging, deeply immoral) individual. For such an individual, Armageddon, or the risk of such, might indeed seen preferable to worldwide humiliation.
But on the other side, if we back down, then we immediately enter a world where every nuclear power may leverage their nukes for potentially unlimited strategic gain. The world would enter a new, even more dangerous and destabilized phase, one in which the US and the west's relative strategic power is vastly diminished: the latter alone makes this choice untenable to Western policymakers.
So then, how to respond? It is an uncomfortable dilemma.