Sankara is just as "tankie" as Stalin, Castro, Mao, Huey P. Newton, etc. The difference is that he was killed before Burkina Faso really had a chance to develop socialism, and as such his name hasn't been dragged through the mud. Regarding Stalin, there are several books I can recommend, but I'll pick just one. Stalin: The History and Critique of a Black Legend by Domenico Losurdo.

Also not sure what you mean by saying you don't "believe in class society." What does this mean? Do you deny the existence of wage laborers and capitalists, or do you deny that classes have similar interests and philosophies that come more naturally based on how we live?

Either way, we all love Sankara. Just because we disagree with bourgeois historiography on socialist leaders does not mean we don't also appreciate the ones that bourgeois historiography has largely left alone.