Rearmament is deterrence. Unless you have a big enough stick, you can't deter anything.
> We should spend money on deterrence.
Then
> You don't need to deter what doesn't exist.
I guess next you'll say Russia isn't even at war with Ukraine and we shouldn't believe our lying eyes?
As an example: If europe gave Ukraine enough cruise missiles to wipe out russias Tu 95 fleet that would be a permanent loss. They were built by the Soviet Union and rebuilding them would take a hundred years at least.
What europe fails to see is the massive ROI from supporting Ukraine today.
Things just changed, so it will take a while to see what is actually happening. But they did claim to have increased a lot what they send to Ukraine.