Perhaps it may come as a surprising opinion but I have met and known a lot of great Americans that are kind and polite to a fault while knowing some Canadians that are petty warmongering ignoramus.
Nevertheless, I can understand that I probably haven’t met enough Americans from every States to have an overview of the ignoramuses that exist accross the border (beyond what is depicted, often exaggerated, in the media and memes — excepting the whole neverending Trump & Friends saga). Not that I absolutely want to meet them either, I have enough to deal with easily Facebook duped and misinformed relatives and sometimes colleagues.
I somehow felt like sharing my general experience after seeing that funny comparison of perceptions.