Most of what he wrote about "or else" is valid and I agree with it.
Why now? Two possible answers, each of which may be true. US/NATO have been using “salami tactics” against Russia for years; Moscow has decided that a second Ukraine crisis in one year is one thin slice too many. Second: Moscow may judge that, in the USA’s precipitous decline, this will be the last chance that there will be sufficient central authority to form a genuine agreement; an agreement that will avoid a catastrophic war. (The so-called Thucydides Trap). Of course I don’t know what Putin & Co will do and we do have to factor in the existence of a new international player: Putin, Xi and Partners. Xi has just made it clear that Beijing supports Moscow’s “core interests”. It is likely that any “counter-threats” will be coordinated. The Tabaquis have responded as expected but maybe (let’s hope so) Washington is taking it more seriously.
Read the whole thing, it is worth it. I think even omitting "or else" clause is a factor in itself.
Russia will never forget Belgrade.