I think that there is a difference in perspective, but I think the causes are different.....
There's an element to this that
seems to have merit- but I think it's not really true.
Granted- we are very polarized on gun rights here, but that's due in large part to the existence of a gun culture (of which I am part) - not necessarily the Second Amendment as such. Combine this with the Calvinist descent of much of our social cultures and you have a real powder keg- and a lot of inbuilt negativity.
Healthcare? Oh, man, there's so much I could say. I'm already editing myself HARD here. Socialized medicine does not
require a loss of freedom. Corporate and political interests in our nation seem set on guaranteeing a loss of freedom, but it's not necessary. Not at our technological level (I'd recommend some reading on/of Fuller is the idea of economics of abundance seems absurd)
I have gone through the post to this point 5 times, removed references to all sorts of things (not Hitler, though!!!) and agree with you.....
Okay, here's my take in large part:
1: Canada has less population pressure. I'd argue that in many respects it has a less intrusive government presence. A higher percentage of the population appears to have some connection to the outdoors, self reliance, and community. I could be way off base, but this seems to be part of it.
2: the US was founded by a bunch of idealists of different stripes who came to some crazy compromises- in addition to the 'hippies' of the era like Jefferson, you had the descendants of the religious outcasts who colonized much of the US.
These weren't people who fled persecution, for the most part- they were groups that were so strident, fanatical, and overbearing in their desire to rule the morals of others that they were kicked out. We were settled, to a much larger extent than Canada, by people who wanted to legislate their version of God's Law on others.
What difference does this make? We've had a social influence to intolerance and cantankerousness since day 1.
We've also had an anti-social propaganda campaign going on for over 100 years claiming that corporations have inherent rights (?!?!) and that it's wrong to restrict the operations of people who desire to make money by nearly any means.
All this rambling comes down to- we've got a huge amount of negative attitude, pessimism, and intolerance of others running through
some of the fabric of our society down here.
Add to that the issues of the Cold War- I grew up with the end of the world, with me, myself, as a dependent, being a target. That's pretty rough. It was MY nation- hell, my
family members who were going to play a leading role in the destruction of the planet. Try getting a positive attitude towards EOTWAWKI with that!!!!
Now, this doesn't apply to all of us. 300 million people can't be painted with one brush. I live in a free associative household of 9 people, only 3 of which are actually related to me. I'm far from the norm. Our EOTWAWKI scenarios involve much larger movement or guardianship plans than most singles and couples in the US. It informs our attitudes, too. I don't feel I'm particularly negative about anything except government involvement

(and I don't hold laws as sacred, which is a peculiar american problem)
edit: and yeah, we have well over 20,000 rounds of airgun ammo, 7500 rounds of .22, and a decent usable stockpile of our other calibers. But we also have a 6-8 month supply of food for the entire group, lots of camping gear, alternative fuel sources, and do supplement our food with real, regular, foraging. I wouldn't say the firearms are the single issue.....
that being said, we don't just have .22s, and not all of our firearms are there for any purpose other than defense. I don't see that as weird- but I've been to bosnia