Jon Stewart defended his pal Dave Chappelle’s recent controversial “Saturday Night Live” monologue. The comedian, 49, guest-hosted the NBC sketch series Nov. 12 and his stint caused an uproar in the “SNL” writer’s room. He was then accused of regularizing anti-Semitism in his monologue, which Stewart, 59, disagrees with. “Everybody calls me like, ‘You see Dave on “SNL”?’ And I …