Being genocidal and, indeed, committing crimes against humanity on a regular basis, does not make one suicidal. Any, and with that I mean any, nuclear state opting to retaliate against Russia using nukes would mean the end of Russia. No, not all of them can glass the whole landmass but there's no Russia without Moscow and St. Petersburg. No empire without its core.

I have. Look at the ~100 earlier examples of red lines and nuclear sabre rattling by the russians.

You have provided zero evidence for your arguement beyond "trust me bro".

Be clear and specific in your arguments. How is being a genocidal imperialist (taking more land and destroying local culture) the same thing as being suicidal?

Let me ask you this. Do you speak russian? Have you ever lived there?