Canada was purchased, with the exception of BC IIRC. As for the rest of their ignorant, racist idiocy on that tweet, we don't celebrate Thanksgiving in November we celebrate it in October and it has absolutely zero connection to the American thanksgiving. Canadians also don't just eat turkey many of us eat ham or goose or whatever the hell we feel like having. Hell, in my house it's either chicken or homemade pizza.
And lastly, YOU live on this "stolen" land too. If you feel that strongly about it, move somewhere else. No one is putting a gun to your head and making you stay here. Also funny how we never hear asswipes like BLM and other propaganda spewing half wits whine about the govt importing ever more people to this "stolen land". I bet not a single one of them gives two shits or a flying rat's ass about the Native people, they're just typical Marxist garbage using anyone they can to try and further their own agenda.