Cam Newton is basically an emotionally immature seventh grader. I know this because I teach a bunch of emotionally immature seventh graders. They see nothing wrong with his behavior. However, these same students see nothing wrong with not following directions, and think that teachers are "mean" for making them follow rules. When they are caught doing something they aren't supposed to be doing, their first response is to deny, deny, deny, even in the face of being caught red-handed. Contrition does not exist in their world.
He thinks that being gracious in defeat is tantamount to enjoying to lose. He claims that he hates to lose, but his actions on the field during the fumble tell a different story. McElroy is right - and not just because he more than doubled Cam's Wonderlic score - about having never seen a player not dive for a fumble. A player that truly "hates to lose" breaks his neck trying to recover that fumble, and I think that this is going to be an issue with his teammates going forward. I don't think that it will be an overt situation where someone calls him out in training camp, but rather during a game when things aren't going the Panthers' way. If he throws an interception that he feels a receiver quit on, there will be fireworks.
Or, maybe Thomas Davis lights him up in training camp, and then stands over him and shows him his footlong scar.