Unfortunately, ignorance and prejudice exists on both sides of the border. They have since at least 1783, when Canada absorbed thousands of former American Colonists, that either chose to continue to live under the Crown, or were forced out by their former neighbors and the new State governments.
As a person who has direct ancestors who both advocated for separation and advocated to remain "British", and direct ancestors who fought for both sides during the American Revolution (including one man who fought on BOTH sides), I think I understand this a bit better than the average person.
It is amazing to read the histories of the revolution from the two different perspectives. You would swear that they were describing two totally different sets of circumstances. Cousins that decided that their relatives had gone mad, others that suddenly wanted to kill each other (not in battle either), and hardened feelings that lasted long after the war was over.
Those perceptions colored the viewpoints of each side, and to some extent they still do. They have infected teaching in the primary and secondary schools, they have colored the perceptions of "Ministers of the Gospel", and they have influenced the ideas of the common people through a process of osmosis.
Both countries have much more in common than they often realize. But sadly, both countries continue to downgrade the inhabitants of the other, to believe the "old wives tales" about the other, and all to often to believe the worst about each other.
I grew up knowing that I had relatives in Canada, and having visited them from time to time. The kids all got along just fine, but the adults seemed to have some differences. As we all got older, it seemed that all too often we absorbed the feelings and impressions of our elders, and grew apart.
What none of my fathers 7 children knew was that our father was a Canadian. He claimed to have been born in Minneapolis, and his mother claimed to have been born in Pembina, N. Dakota. We knew our grandfather lived in Canada, but we just assumed that he had moved there after he and Nana had divorced.
Lo and behold, after my parents died, I began to work on a family genealogy. There was no trace of my father anywhere in Minnesota (not even a family that was remotely close to them). No trace of my grandmother being born anywhere close to Pembina. I found my mothers family, with no problem, but my father was a total mystery
Then, I discovered his younger sister, who had not seen our side of the family since 1946. I queried her, and she was amazed that "You actually believed that lie". She told me, "Your father was born in Winnipeg, just like the rest of us. Our mother was born in Manitoba too, and our father was born in Nova Scotia."
Turned out she was right, and I have been able to trace his mothers family back to Scots who came to work for the Hudson's Bay Company and their Native brides; and my grandfathers family back to over 250 years in Nova Scotia, as well as back to Blair Athol, Perthshire (and those Loyalist families, which BOTH the Canadian and American sides of my family had). My grandmother had been born on a farm in what is now the Rural Municipality of Franklin, Manitoba, which is very close to the US Border. They used to go to Pembina to do their shopping, because it was a much larger town.
Thanks to my father being an illegal alien in the States, I was able to claim Canadian citizenship (along with my siblings). I have spent the past 30 plus years learning as much as I can about my Canadian family, and about my second country. It has been a fascinating journey, to say the least.
You can quote all kinds of beliefs that the ignorant, and the illiterate have. I truly believe that most Canadians and most Americans respect each others countries, celebrate both the things in common and the differences and get along just fine.
Unfortunately, "red necks" occur everywhere, and you can not expect them to be ambassadors for their own country, much less be open to any other.