Oh Canadian insecurity sometimes. One on one there's a brotherhood and an appreciation when both nations need each other but once drunk or on social media decorum goes out the window and frustration peek its nose. Almost like a siblings rivalry between brothers...lolI was just explaining this at the bar. A friend of mine one complained about the hate they received for being American. My reply was, in my experience, if you don't bring it up yourself, it's not even really a problem to begin with.
Stereotypically, Americans tend to be loud and boisterous about it. I've been here long enough, it's not the kind of thing I really talk about openly or bring up, unless there's a specific reason to. So it's not even much of an issue. And if I do, it's usually in the context of a light hearted joke, which Canadians just laugh and move onto the next thing. I've heard about other Americans getting shit left on their car or said to them in traffic for having American plates. But again, if you're not openly advertising it, it shouldn't be much of an issue. 🤷♂️
I'm french Canadian I have experienced just two belligerent encounter in 30 years in a bar and at a function...not too bad ... online I have had to point things out just a few times that we are all pretty much the same and prejudices are not helpful or some are not based on historically accurate facts.