You are an idiot. Cortland is a little bitch. The game was basically over. He had been beat by Johnson all day, and was talking shit. BUT Johnson didn't take any bait, if you actually paid attention you'd know that it was Johnson that instigated it the previous play, blasting him again during a blocking assignment and jawing afterward. Then for some reason, the very next play Cortland decides to go straight to the head and pays the price for it.
As mentioned Johnson could have destroyed this guy for life, and got in a pretty good punch or two. What actually impressed me most about the whole situation was Johnson in the locker room afterward saying all the right things. He condemned his actions and took responsibility for it like a man, something you never see in the NFL. I would imagine his words and his past history are the reason that neither of them got a suspension because if he didn't and Cortland did that would be some bullshit.
And no, it adds nothing to the game. You are just quick to jump on the bandwagon of anything violent.