(McMinnville, OR)  --  An Oregon college professor is sparking backlash after accusing the original Mary Poppins film of being racist and promoting blackface.  Professor Daniel Pollack-Pelzner of Linfield College published a New York Times op-ed called Mary Poppins and a Nanny's Shameful Flirting with Blackface last month, in which he references the iconic rooftop dance scene featuring Poppins, Dick Van Dyke's character, Bert, and the Banks children.  He accuses Poppins of "blackening up" her face with chimney soot, and says the scene associates chimney sweeps' blackened faces with racial caricatures.  People on Twitter have hit back, saying the scene and the movie are not racist.