Of course Tatum hit Stingley with the intent of hurting him. On defense, you want to put as much pain into the offense is you can, to give them something to think about next time. Maybe football is different now; I don't play it (of course) and rarely watch it. But that is the way the game was played back then. However, "hurt" means "cause pain", not "paralyze". If that's too callous and "evil" an approach, maybe you should avoid the sport.