PORTLAND, OR— This morning, a popular vegan cafe is enveloped in an angry horde of vegans protesting the cafe’s use of human labor. Fighting our way through handmade signs reading “End Vegan Hypocrisy” and “Stop Exploiting ALL Animals,” we got on the scene to investigate. “Humans are animals, too,” protester Eric Patton told us heatedly, pushing his blonde dreads out…