Norm Macdonald’s constant jokes about OJ Simpson being guilty of double murder have gone viral since the infamous NFL player’s death. The comic, who passed away aged 61 from cancer, spent years branding Simpson a killer during his appearances on ‘Saturday Night Live’ after the athlete-turned-actor – who died aged 76 on April 10 – was sensationally acquitted of the 1994 double murder of his ex-wife Nicole Brown Simpson, 35, and her 25-year-old waiter friend Ron Goldman at her house in Los Angeles. Norm repeatedly targeted Simpson during the ‘Weekend Update’ segment of ‘SNL’ – and later said he …