According to the rules it was targeting. And it's a good rule. I feel bad for the tacklers because when the offenses head lowers it's natural for the tackler to lower his. If he doesn't get low enough, it looks like targeting.
Our high school team I played on used targeting on most tackles. More than 50% of our games the ambulance was called onto the field. I played linebacker with another who was 240 and tough as hell. I stood the runner up at the line and the other guy tackled his thighs, snapped the thigh. Two years later, we were playing the same team, same exact play, same spot on the field, only this time I was a second slow so the big guy beat me to the tackle. He met the runner head on and broke his neck right in front of me. Terrible. Not intentional, just hard.
I would have loved to play for the Bison but I was too slow and I always led with my helmet. Trying to do that against players like the Bison I wouldn't have had any brains left.