Actually, BS targeting there. The hit to UM's hip altered the trajectory of his head, which caused the Army guy's helmet to hit the UM's helmet a split-second later. The Army guy wasn't even looking directly at the UM guy.
If that's a genuine, correctly-called penalty, then this isn't football anymore. I don't like making dramatic statements like that, but honestly....the defender was mid-tackle motion when the ball-carrier's whole body trajectory changed.