I'm sure the Pope isn't a Christian either, and that ISIS aren't true Muslims, right?
Nobody is saying that America is without sin, just that the amount of criticism it recieves in comparison to other far more sinful parties is hugely disproportional.
Canada is boring as it is, I doubt a nuclear apocalypse and ensuing winter would make it any more lively. I don't think they're going to go for a "frozen north" theme in the next game.
The pitfalls of being a world-leading superpower.
America is at the centre of the world stage, of course it's going to attract more criticism than other countries. Controlling the media means you have all kinds of attention, not just criticism.
While I'm not very partial to the "America is more deserving of shit than other countries" rhetoric, I also generally dislike the "but look at x, y and z, clearly we're perfect angels undeserving of all this harshness" retort. Other people's faults aren't an excuse to ignore your own and everyone is always slinging shit at everyone else regardless, so the best course of action is to ignore it.
(I don't mean to address you personally, I'm just not going to bother quoting a conversation-worth of posts).
As for the actual point of this thread, I think a hypothetical Fallout: Canada could work. I'm thinking in particular about the canceled Fallout Extreme, with the BoS now being the villains (to complete the entire spectrum of morality) and the player being part of a philanthropic paramilitary faction called "the Cause".
Obviously, I'm not saying the hypothetical developers should mirror that word for word, just that they could feasibly borrow elements from it. The factions could be a pseudo-fascist military organization that promises security in exchange for freedom; the Cause as the freedom-fighters whose sole goal is to liberate their land from the fascists' oppressive regime but ultimately have no real intention to create a unified government; a known Fallout faction (possibly the NCR) to link it back to the previous games and offer a third alternative of some description (possibly a union of tribes lead by the planned Issaquah faction that want neither one nor the other) and, of course, the independent route.
I'm no expert on Canadian landmarks and I've only ever been to Vancouver, so I don't really care where exactly it's set; as Bethesda has shown and Obsidian already knew, nobody gives a shit about the actual location apart from the people who live there.
Theme-wise, I think rebellion and civil unrest would work quite nicely; it's already tied into the place's history and the created factions easily follow that scheme. It would also provide an interesting contrast between the companions which could be capitalized upon.
Visually, I actually agree that stars-and-stripes would be a good choice. In pre-war newly annexed Canada, propaganda would have been at an all-time high; some tribes could even come to believe that "America" is actually some form of god, and the presidents are spirits.
Lastly, hardcore mode could be expanded to become more than just an annoyance; in the harsh post-apocalyptic Canadian wilderness where there are only tribes and few real cities, gathering your own resources would be essential.
For a proper story we need a good conflict, like the dam. Is there any lore regarding weather in that region, I'm just curious how much conflict there would be outside of jack frost kicking your ass, unless the resource that's in demand is firewood and kindling.
New lore could simply be created, and it doesn't have to be a McGuffin every time. Obsidian always likes to create a situation of political turmoil, introduce the player to a moment in history where shit is about to go down; the Dam was just the catalyst in New Vegas.
Either way, I believe there was a planned area called the Sound in Canada which although lacks a description or even a proper location, sounds mysterious enough to be some kind of super-weapon.
It'd be great to see the Troll Warrens introduced as well since it's a concept I really like. An entire city populated by nothing but super mutants and ghouls established almost a century ago. How does a childless society develop? How much would change in a community where everyone is functionally immortal? How does this mix with their shared history of persecution? Are there conflicts between the ghouls, who for the most part maintain their intellect but are generally weaker and the super mutants, who rule the city and are superior in almost every way but the majority of whom have an IQ no higher than that of a child's?
TL;DR Yeah, I think a game set in Canada would be cool.