If you are a hater, then you will be condemned as a loser, so avoid a hateful feeling to avoid being misjudged. Hating someone is crucial for our well-being. We have to protect our heart not to get inflicted with an evil feeling. The person we hate might retaliate and the more life will be in a serious situation. If the hate prolongs, the person might take revenge to satisfy his hate. But think of the bad consequences, you might land in jail and never enjoy freedom again .