If you tried to explain the concept of Pepe the Frog to someone who didn’t spend much time online, you’d probably sound insane. “So, there was this innocuous cartoon frog who was part of a comic called Boys Club, and he was co-opted by alienated people vying for attention, which then changed the frog into a symbol of white supremacists who want to be feared but use ironic detachment as a shield.” Crazy as it sounds, that’s what happened with Matt Furie’s creation, and Arthur Jones & Giorgio Angelini’s documentary Feels Good Man chronicles …