Americans in the Netherlands will say Canada. Caught a few different groups doing while I was there.

Sir, it's very clear you've got that Southern US twang, we don't speak like that. "They treat us so much better when we say Canada". How about you don't do that and just be polite.

I'm pretty sure any reasonable person will understand it when you say something like "I'm one of the polite and quiet Americans".

I have several American friend. One of them was 100% certain he didn't sounds American so I called it out a few times and he finally agreed.

I've also been ~10km across the boarder at a hotel. The bar staff called me out as a Canadian within 5 min. "It's the way you say 'house'". I got them to say it, I said it, sounds EXACTLY the same to me but they said they're certain.

Point being, people can tell you're lying most of the time so it's really not worth it.

I can't 100% id Canadians, but I can usually narrow somebody to Canada, Minnesota, or Wisconsin. Those blur together to my ear. In fact some US accent maps even call MN and WI as Canadian Accent. I don't even get that perfect all the time. Some southern Ontario peeps sound like US midwesterners to me, what that linked map calls "Northern Cities Accent".

Anyway, Canadians can write your reps about Bill C-34 instead.