Google on "War's Irrational Motivators", an essay in the Armed Forces Journal by Ralph Peters. Can't reach it from my work computer to link.I wouldn't ever think there's any remote chance of nuclear warfare coming out of this. This war is going to be purely economic, unless Putin is actually, genuinely insane. Poland, the Baltics, and Finland are all completely safe, and if there was to be a war it wouldn't constitute a total war.
In short, don't be so sure. Humans have been doing "hold my beer" at scale for centuries.