Seth Simons, the freelance comedy journalist who drew attention to Gillis' racial slurs that led to the comedian's firing from SNL, had changed his Twitter name to "Real Joker." Macdonald responded to Simons' Twitter name on Thursday afternoon, tweeting: "Hey, you f*cking piece of sh*t, it's you that's The Joker, a failed stand-up that kills someone who got a TV show. I cannot wait to meet you. And I will." Earlier, Macdonald tweeted out a clip of a Gillis comedy sketch. "This piece of sh*t Seth Simons couldn't make it as a comic so he decided to destroy real comics," Macdonald tweeted. "Here's an example of what this piece off sh*t protected America from."