I agree with this, I'm pretty sure he is going to use a small tactical nuke some point this winter. All previous conventions on how states should behave are off. Although I am confident that it won't result in a full scale war, I think it will trigger a complete shutdown of all interactions with Russia, total embargo of everything, every pipeline closed, every border closed, and the ensuing energy shutdown across Europe which is going to hit everyone hard, particularly Germany, but every European country will be stuffed.
It'll just increase upward pressure on the dollar, at a time when markets are starting to look out the other side of the inflationary problem.