There are a number of sites found through google searches about the fundamentals of tackling.
On any of them, you'll see references to eyes on the numbers. Check.
"Heads up tackling" is being taught nationwide as the safest method of tacking. One aspect of their technique and this is a quote:
“Back in the early 80s and late 70s, a lot of the tackling techniques put the players facemask on the numbers of the front of the jersey. Now, players should move their facemask and helmet to the side when tackling a player. This should reduce injury or impact or force to the head.”
One couldn't ask for a better technique from a player.
Let's not ignore the post earlier by
@sk33tr ... the call was "he wasn't a defenseless player." That kind of hit happens on just about every running play.
Those bitching are bitching because it's Alabama. It has nothing to do with the hit.