It's one of those, while the commentators(at least ones I'm hearing) are saying he was no where near the ball, he was actually pretty close to it. However he kicked through the ball and chose to early in a situation where doing so was going to kick Young very hard. It was stupid and reckless. if he'd gone in and not swung through the ball, just to tap it away it wouldn't be a red. But that he put in a large amount of follow through which was going to result in him smashing Young regardless of getting the ball, the red is an okay enough decision.