Trump’s senseless capitulation to Putin is a betrayal of Ukraine – and terrible dealmaking | Timothy Garton Ash
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My use of "doors" was the wrong metaphor - I meant it in the sense of providing increasingly advanced military support with decreasing limitations as well as increasing kinds of pressure on the Invader in a phased way rather than as a continuous improvement.
As for the rest, you're not actually supporting your original point that they want to do it, you're just saying that they now have a scapegoat if they did wanted to do it and it's not even that clear how well would it work for them to use it since most of the European Public Opinion is turning anti-American and wouldn't react positively to bending over to Trump's will. Anyways, "could" says nothing about "wants".