The image is accompanied by the text, "Hang with me on Louis Riel Day."
Louis Riel Day is a February holiday in Manitoba.
"I really feel disgusted when I see something like that," said Gabriel Dufault, president of the Franco-Métis Association in Manitoba. "It's obviously the work of one with a troubled mind.
"It's racist in nature and I don't see any humour in this at all."
Riel was a former MP and leader of the Métis people, and is considered the founder of the province of Manitoba.
He was hanged for treason in 1885 at the age of 41 after leading Métis resistance in Saskatchewan against the Canadian government.
Today, he is regarded as a folk hero by many for his defence of Métis rights and culture.
I could see how someone could deem it in poor taste or even 'offensive' (a grossly overused term in its own right) but racist?
Don't agree or disagree with me: TELL me...HOW is it racist?
For more on offensive shirts, see Lucky Brand Sells "White Lightning" T-Shirt and Duluth Shop Sells "Drunk Indian" Shirts.