A particularly depressing aspect of this and the Ray Rice situations is that at least 90% of people's responses are emotional, thought-free reactions that inevitably come down on one extreme or the other, when the truth is somewhere in the middle. Unfortunately, that requires patience and thinking, which very few want to do.
What AP did to that boy is awful and tragic. It is also consistent with his upbringing and his faith (to be clear, those don't excuse it, but they provide context for understanding how it happened). The fact that he believes he is acting in the best long-term interest of his son is important, no matter how ill-informed that belief may be. That's different from him being pissed off about losing a game and taking it out on his kid. The NFL will do whatever is in its best financial interest, and if we're lucky that will align with what's best for AP Junior. Maybe a two to four-week suspension for AP while he goes to counseling to learn how to be a strong father without resorting to violence, especially at that level. States may disagree on whether corporal punishment is allowed, but there is still a line and this is clearly beyond it.