You ever tried running at full speed and then stopping instantly with your hands behind your back? It's not easy as the momentum will carry you forward. His hands came in front to stop him clattering into Gibbs and balance himself and stop him falling forward. At that distance you can't call it deliberate or if thats the case then players should just aim for hands when crossing in the box to get a penalty.
Looking at it you can see he was trying to balance himself and wasn't going to handle the cross. Even if he had the time to see it and then put his hands up intentionally, why? the ball was going to hit him in the stomach. It's not like his hands were above head or out to the sides. Really harsh and a non penalty imo. In slow mo it looks like there was ages of time but by the time he got there, the ball was crossed.