Debra: is he so stupid as to think he was going to get a great influx of sympathy?
He's a classic bully, so when he faces a situation where he can't just aggressively beat someone down, he plays the "woe is me" card to get sympathy and complains that others are bullying him. You've probably read about the countless times when he bullied people, and you can see him gripe about being bullied constantly since this all happened.
I'm not sure if he thought it would work, as much as he was so angry and upset that he could only think about trying to vindicate himself by snapping back at Kim as quickly and harshly as he could.