The fact that they are willing to use this switch in this way is far more damning than if they had done nothing at all. The problem is that one of the so called 'allies' here is behaving in ways that make it very difficult to sustain using that term.
And military alliance or not, there is such a thing as justified defense and it used to be in the decades leading up to 2015 or so that the USA was a reliable defense partner. I realize that 10 years is a long time, but a lot of people have been very slow to realize how far the rot has worked its way in.
Weapons bought and paid for by EU money are being withheld, and that's in light of daily slaughter of Ukrainian civilians (I have no other word for what is happening there).