Adam Benzine Guest Contributor Oscar-winning documentarian Laura Poitras slammed the heads of the Venice and Toronto film festivals for “engaging in a kind of whitewashing” by programming glossy documentaries from the Clinton family. Her comments come as TIFF this week hosted the Canadian premiere of Poitras’s “All the Beauty and the Bloodshed,” a documentary about the artist and activist Nan Goldin, and just days after the film won Venice’s top prize, the Golden Lion. It is the rare doc to land slots at the superfecta of Venice, Telluride, Toronto and New York, and Poitras said she thought “long and hard” about whether or not to voice criticism at the same venues feting her latest work. Nevertheless, she said, “journalists need to ask hard questions.”