The US isn’t a homogeneous entity: for at least 40 years (since the 1980s) there’s been a sharp divide between the general populace and the elites. Unfortunately, this wasn’t corrected until it became overwhelming resentment. You can look at the Seattle WTO riots for an example.
> Everyone is fine if you want a change, go back to your own country, stop trying to be World Police and focus on domestic issues for a few years.
NATO et al have repeatedly complained about just that.
> What we aren't happy about is the constant threats of invasion and subjugation.
Neither were Afghanistan, Iraq, Libya, Syria, etc. What’s shocking to Canada and EU is not that the US has changed, but realizing where they stand in the world outside of a US supported alliance.
The US is merely applying its policy from the past 80 years within its North American sphere of influence (ie, Canada, Greenland, Panama).