Rest - maybe not. But russia currently holds territory about the size of the 3 baltic states. And Ukraine before 2022 had about 10 times larger army than those 3 countries combined.

yes, but we're talking of waging war against actual NATO and the EU, not a country which was vaguely friendly towards the west.

No european country has actually put a lot of effort into supporting Ukraine, but if an actual EU+NATO member was attacked things would be different. Even without the US.

It's not accidental that Russia invaded Ukraine and Georgia but not the baltic states.