Earlier quoted context omitted.
They are willing to bear some pain in order to hit back at the US administration. And they're pretty united - Doug Ford for instance is not on the same team as Mark Carney - but has been very vocal about striking back. It's really a singular achievement to piss off such a good neighbor so badly.
And don't forget the Greenland threats, those for us Europeans, and in European foreign affairs are a line of non return. Other administrations will not be able to repair the damage, because what was exposed really is that the US system allows for each administration to destroy and 180 whatever the previous one did.
But we've had challenges and issues before. The US has tried to obtain Greenland in the past. There are plenty of examples of such things throughout history ranging from the Suez Crises, to French withdrawal from NATO, to, well, 2 World Wars caused by Europe, and more and all was forgiven, if not forgotten.
We sometimes think that things in the moment are perhaps more important than they are. The news wants us to believe the world is ending to get clicks. Europe still lets Russian tourists in and houses Russian billionaires and their families despite this existential threat from Russia, as an example.