It's part of the whole package when it comes to alcoholism. They always have their enablers who reinforce the blame on others or circumstances. "If only this person didn't do this or this wasn't happening, my beloved wouldn't drink. Go ahead, baby. I'm with you. Have a drink to calm your tortured soul. I know Jon is an evil bastard and the root of all of your problems. " They're essentially partnering up with demon that has taken hold of the person. When Jon is referring to Richie negatively, he's actually referring to that demon and not Richie.