There is one problem. The NFL isn't played at photo speed. It is real time, and it is very fast. Your talking about fractions of seconds to make a decision.
If you run the play and look at both angles, there is some grey area for sure. Jenkins is protecting the outside at first, so he is doing his job right off the bat. He was doing his job. He steps towards Ward (he shifts his weight from left to right), who is staying inside, with his right leg . Then, Jenkins sits and waits for the oncoming running back.
How can any of you guys get inside Jenkins' head and know what he is thinking or seeing at this point, because you don't know how fast that play is moving?
When he starts to make a move towards the runner, Burnett enters in the picture, and Jenkins hesitates. What if he just wanted to avoid taking Burnett out? You don't want to tackle the wrong guy. I simply think Jenkins just mistimed his move on the ball. You can't get inside his head and diagnose the play. No one but an NFL player knows how fast the NFL is, and this guy has started 3 games as a full time player.
How do we know that he simply waited too long while sitting for Ward, and while sitting, he lost his angle on the fast running back and had a better angle on Burnett. When he starts to make his move, Burnett is there and Ward is pulling away. In my opinion, it had nothing to do with quiting, because none of us know what it is like to play at NFL speed on a football field.
I've seen this guy hustle and hit people. He was hustling on the play before where they ran the ball all the way down there.