For comedian Lou Perez, that moment came on January 7, 2015. Cartoons and social media posts became the controversy. Perez, who might best be described as a good-natured free speech jihadist, has spent years arguing that comedy isn't merely entertainment. Those themes run throughout his conversation with AJ Rice and are explored further in his outstanding book, That Joke Isn't Funny Anymore: On the Death and Rebirth of Comedy. The joke isn't the threat.