Putin has shown restraint over past two decades, so he probably won't use nukes. Those who may replace him, real hardliners, may be less restrained.
Ask the people living in Georgia, Ukraine, and occupied Chechnya about how much "restraint" Russia has shown them.
>Those who may replace him, real hardliners, may be less restrained.
In the context of geopolitics Putin is the hardliner. The other "hardliners" are all puppets that are used to give the illusion of dissent in Russia.
Actually people from Chechnya are fighting for Putin now. And the government of Georgia resist attempts to draw it in war with Russia like crazy, so they also appreciate the peace with Russia.
Interesting framing. Do you also refer to Donetsk and Luhansk under Ukranian authority as Occupied Donbass?
The worry as I have heard it that Russia may not be willing to accept defeat in the Ukraine and will use nukes in the Ukraine, not USA or Western Europe - which is of course bad enough in itself - and that this might escalate into a global nuclear exchange.
Your final point is interesting - I suspect it is a logical artifact. The people who are worried about nuclear war are generally people who want to minimise death; and people who want to minimise death generally prioritise peace; and people who prioritise peace are generally labled as wanting Russia to win, as they would give Russia concessions if it means fewer hundreds-of-thousands of deaths - and anything other than a total victory for Ukraine is said to be a victory for Russia.
Actually if Putin thinks that it's an existential threat, he WILL use nukes, no matter what other people think on this matter
Imagine for yourself what "victory" against Russia, China, and Brazil would look like. How many millions would be dead?
The Russian political elite are enjoying their luxurious lives in Moscow. Many of their children and grandchildren live in the West. They are not going to destroy the planet just because they will a smaller slice of Ukraine than they had hoped for.
It is interesting that "Russia will nuke the whole world" fear mongering is only coming from the people who want Russia to win.