Earlier this week, Sarah Silverman gave a speech on her Hulu show I Love You, America, addressing the sexual harassment scandal surrounding her longtime friend Louis C.K. – a situation that clearly devastated her. But speaking on a panel at the Vulture Festival in Los Angeles on Sunday, she said in some cases, it's important that we understand what drives people to behave like that, if we are to move forward and make improvements. "It's OK to have some kind of empathy…