THIS! It was essentially kill or be killed in that scenario. He had no other choice.
Wasn't Kenny going FULL BOAR as well. Weren't they headed in roughly the SAME DIRECTION. This is like saying trading paint in a NASCAR race is the same thing as a HEAD ON collision. Right, that makes total sense there.
Seriously get off your high horse, it was a great CLEAN hit. The only reason the kid got hurt was because he landed on his head. From personal experience the thing that hurts most after a good decleater, assuming you don't land on your head, is your pride. Football is about collisions if you want people to play nice go watch badminton or something.