“The Daily Show” host and comedian Jon Stewart was under fire Tuesday night for having former Fox News host Bill O’Reilly on the popular show to talk about political fanaticism and extreme rhetoric. Earlier in the show, Stewart shredded Republicans for calling for “unity” and “healing” despite doing the opposite in the wake of the attempted assassination of former President Donald Trump that left one person slain. He then hosted O’Reilly for a 12-minute discussion on the state of politics that led to the shooting, and to discuss his new book “Confronting the Presidents.” O’Reilly made the case…