I'm not excusing it, but I was curious if there was anything that happened between the two of them prior. Usually these things don't just happen out of the blue. I've noticed that previous games against UTEP had a lot of "extra curricular" activity. On this very play, 54 is blocking 6 and has a hold of his jersey. He sees the runner has passed him and is down and decides to drive 6 into the pile to pancake him. This is well behind the play. Again, I'm not excusing the head stomp and there needs to be severe discipline against him. I'd be interested to go back and watch the whole game and watch the matchup between the two of them.
https://youtu.be/iN0zLfvE1RY?si=hcpEig30n9TFQslN
And don't tell me "play to the whistle" because the rules don't allow for this kind of activity behind the play, either.