I am a big fan of Balotelli and he is very skillful on the field and entertaining off it. Football needs player like him, he is a 'character'.
But the foul on Parker was deliberate. It was not a natural motion and accidental, he knew the player was down and the back heel studs in the face was meant. He seemed genuinely apologetic afterwards, but the initial, spur of the moment action was nasty and should be punished.
He is young, and he will learn, and hopefully entertain us for many more seasons - without this wrecklessness.