Hatred cannot come in the form of speech, because hatred reeks of action, while love reeks of satisfaction. We are not satisfied, when we act. We are satisfied, should we be in true love. And when we are in that true love, we do not act, because we are satisfied.
Criticism, rather, is on the side of love, as well as care, and comes in the form of speech.
Hatred is the blow of a vendetta, against the person meant to be ended of their existence.
What one can do with words, is limited to just words, and nothing more. Should one utter a threat, out of hatred, but one does not commit to that dark and suffocating emotion, they are a coward. Or, they are impulsive, and still nothing more.
Criticism speaks out of intellectualism. Criticism betters a life, by encouraging the life to act.