Only totalitarian societies punish citizens for thought.  In a free society one is free to hate as well as love.  Any person is free to think as they wish.  Murder is currently illegal and should be punished with fairness and justice.  Murder, the act itself, is the crime.  The motive for the murder is not the crime.  If one man chooses to kill another man in order to rob him, he should face the same punishment as the the other man who chooses to kill based on thoughts hate.  If you punish the same acts differently because of the motivation of the killer, then you are, in essence, making thought a crime.  It is wrong to punish thought.