How Stew Peters parlayed conspiracy theories into viral documentaries and a massive following.On January 5, Sen. Chris Murphy (D-Conn.) tweeted about the unexpected passing of Quentin Williams, a Democratic member of the Connecticut House of Representatives. “Terrible news today of Q Williams sudden death,” he wrote. “I’m sending every good thought I have to his family and friends today.” Most of the replies to Murphy’s tweet echoed the senator’s sentiments; many commented that it was especially sad to lose someone so young—Williams was just 39 when he died. But some of the commenters seemed determined to take the conversation in...