How fucked is Europe if Russia decides to actually go yo war over this? Does any country in Europe have any army to speak of or are they actually just on the teet of the US?
During the Cold War, and even into the very early 2000s, the stratagem for European countries was to delay Soviet/Russian advance for as long as possible to give US forces to build and react. All on the pretense that there wouldn't be enough US forces around in the beginning, so there were going to be big losses. I think they got more comfortable seeing how strong US airpower was, but you can't win a war on multi-role fighters and their ordinance alone. UK has some projection power, but that's it. During the Syrian air campaigns back about a decade ago, France participated, but ran out of missiles.
The entire country went through it's armament and stockpile of all their cruise missiles.
If you happened to see any combat footage or propaganda out of Russia during the Syrian conflict, you would see stuff that would have you believe you were looking at US military hardware. Live-feed satellite based cameras. Infrared imaging. Drones. Laser guided missiles and bombs. They were flexing and showing off in Syria similarly to how we did so in Iraq during the Gulf War.
We've been running around shooting Hadjis in the desert for two decades, and I don't think we were allowed to win those conflicts despite our overwhelming ability to crush them. If we had to go up against an opponent that was symmetrical capability to us in technology and fighting power, we'd curse the day we let fuckers like Miley anywhere near should boards with stars on them. Years and years ago, someone could dismiss the threat of Russia by reminding everyone that Russia was an inept society run by fish-egg huffing, corrupt, vodka drinking day-drinkers. Compare that to the US and our Floyd Worshipping LGBTQ+ neghole pozzing, and it suddenly seems like a very unfair fight for us.