He cares about his players, is competitive, and is an emotional guy. That leads to outbursts and yelling.
He is getting more grief than probably deserved, but if you notice- another player stepped in front of Izzo while he was yelling at Henry and handled the situation. Izzo's approach is one that is slowly disappearing and obviously isnt always effective.
"I just felt at that moment I could get the message to [Henry] better than coach,'' Winston said. "The yelling approach wasn't working at that moment. So I just asked coach what he wanted me to tell him.''