Maybe
we shouldn't tell Russia what "an existential war" is.
“Ukrainian entry into NATO is the brightest of all redlines for the Russian elite (not just Putin). In more than two and a half years of conversations with key Russian players, from knuckle-draggers in the dark recesses of the Kremlin to Putin’s sharpest liberal critics, I have yet to find anyone who views Ukraine in NATO as anything other than a direct challenge to Russian interests.”
Burns, then the American ambassador to Moscow, wrote to Secretary of State Condoleezza Rice in 2008.
"The Western view is that the Kremlin is supposed to understand and accept that the alliance’s activities, among them war games replete with American tanks staged in nearby Baltic states and rockets stationed in Poland and Romania – which the U.S. says are aimed at Iran – in no way present a threat to Russian security."
Lost in the outrage over Russia’s invasion of Ukraine is the fact that many in the West have long warned that widespread NATO expansion into Eastern Europe could spark just such a conflict.
theconversation.com
We shouldn't tell Russia what to consider a threat, as Russia doesn't tell Germany what to consider a threat: “Anything that enables Russia to continue its war of aggression against Ukraine also represents a threat to our security.” German foreign ministry.
It is not what we think Russia thinks, it is not what we think Russia should think, it is what Russia thinks.