sgrig
Comrade
If the North Atlantic Treaty Organization and the Russian Federation went to war, then neither side would use nuclear weapons. Neither side is that stupid. That argument is moot.
Russia specifically says in its military doctrine, that it reserves the right to use nuclear weapons against a conventional attack. This would always be the last resort option, and no-one would know at which point the nerves would snap. Because of this uncertainty, NATO would never attack Russia (unless of course Russia itself launches a Cold War style armoured attack through the Fulda gap, but this is of course impossible nowadays).