Apparently Elon Musk has begun
standing down his early support for Ukraine, on the stated concern that further Russian reverses might lead to nuclear war. I also think that Russia might use nuclear weapons. Partly this is because Soviet Russia never believed in the US doctrine of "Mutually Assured Destruction," but rather in a doctrine called "Nuclear War Fighting." Use of nuclear weapons on a tactical basis was always part of their doctrine.
More, it's because the collapse of the prestige of the Russian military poses a kind of existential threat to Russia. China, which opened this game pledging support for Russia in order to gain a precedent for its own longed-for seizure of Taiwan, must now be looking west at Russia with a growing appetite. If Russia proves gutless as well as toothless, why not take Siberia or some of the 'stans? Taiwan can wait.
Further, I notice with alarm that American and NATO support for the Ukrainian war continues well beyond what we can plausibly deny. There are aspects of some of this that we can pretend might or might not have been us, but there's no doubt that the US military and intelligence community are outright involved in the war. One can only carry out acts of war, even against an aggressor nation like Russia, for so long without tripping any tripwires that are out there.
Our intelligence community continues to assert in public that they see no signs that Russia's nuclear forces might be readying for action. Perhaps; but they saw no signs that Pakistan nor Libya were developing nuclear weapons at all. Assuredly watching the Russians has been a major focus of theirs, but so too was watching the Taliban -- which they assured us could not hope to advance rapidly on Kabul.
The Musk proposal conveys everything Russia wants, allowing them -- like the Mouth of Sauron's ask -- to gain at the table what they otherwise might have to fight a long war to obtain. Perhaps they do not have the strength for that war, nuclear weapons or not. Yet we also do not have the strength our leadership seems to believe that we do; we are no longer the power we once were, the one that bestrode the world at the end of Reagan's time. Our military now is far smaller, its equipment exhausted by decades of war, and presently unable to recruit soldiers or sailors or even many Marines. The nation is too divided for a draft, especially for another foreign adventure in a place to which few Americans have personal ties.
Perhaps the beatitudes are right, and the peacemakers are blessed.