It's a scenario that had a lot of facts behind it in the 1980s, but really not so much in the 2020s, for all that the decision makers of today grew up with the ideas of forty years ago.
Generals are always ready to fight the last war all over again. Politicians even more so.
Mutually Assured Destruction was an effective peacekeeper in a world where two superpowers dominated everything. Now that Russia has ceased to be even a plausible great power, things are much less simple, and nuclear doctrine has changed, whether we recognise the fact or not.
Russia is not USSR. Why are you harking about earlier times? At the moment Russia just wants peace and free trade.
Generals everywhere have to be ready to fight. Politicians may seem to do so. In practice things may be different. Why Trump has not started Iran-2?
There are other players in the game too, China, for example. Why should Europe always be a slave to US? They too are powerful. They have enough bombs and missiles to blast any country to pieces, including US. Britain and France have some (290+260) 550 bombs.