Now I'm not saying I don't think there should've been a flag. There definitely needed to be a flag thrown on that play. However, After watching the play several times it's very obvious to me that Sherman was going after the ball.
1. It looks pretty obvious to me that he's taking an angle at the ball, he ran into he kicker because the kicker just happened to be in the wrong spot at the wrong time. He jumps with his shoulder and back to the ball in an attempt to block the ball and avoid getting nailed in the face/chest/stomach. It's the way I'd jump at the ball lol.
2. What in the world does he have to gain from going at a freaking kicker?? Not even Vontaze Burfict is stupid enough to intentionally hit a kicker. Maybe you can get away with a dirty play on any other player. But not a kicker. If you think this is a dirty play that's kinda sad. Still a penalty, just not intentional.