"I know it seems strange, I don't mean to make you uncomfortable, I don't know why everyone is so rude, I don't know why you are; I don't want anything from you. Maybe a little warmth, maybe a hug dad, maybe a bit of common decency!"
That's him asking for warmth, love, and decency from who he thought was his dad.
"Have you seen what it's like out there, Murray? Do you ever actually leave the studio? Everybody just yells and screams at each other. Nobody's civil anymore. Nobody thinks what it's like to be the other guy."
That's part of his final speech before killing the show host. He's crying out for society to be kinder, and more compassionate.
So naw, it's not easy for me to see that this man became a chaos loving maniac from what's been shown. The writer's dropped the ball.