I am sure the Kremlin has a working back channel to the Pentagon these days.
https://twitter.com/PentagonPresSec/status/15013364457299681...
Threats were made, I am sure.
Lets admit we have no clue what is going on behind the scene.
If you play the tit-for-tat ratcheting up escalation game with Putin then all of humanity is going to lose that one.
Right now its somewhat restrained since his generals won't want to launch nukes at NATO over the aid that has been given so far. When you cross a certain line so that Putin can argue that NATO bases in Europe are the proverbial dagger pointed at the heart of Russia and they must go so that Russia doesn't fall, then its much more likely that you've handed him the rationale for a tactical nuclear strike that his generals will follow.