Just listened to Heckingbottom......
Obviously nobody would condone what happened to Sharp and I'm sure the culprit will be identified and punished. I can't help but think the lack of control shown by Heckingbottom on the sideline and some of their physicality set the tone for something of this nature to happen. He couldn't control his own temper during the game so perhaps not best placed to condemn what happened.
Doesn't excuse it in any way but everyone's actions have consequences.