This is a wellknown story:
One evening an old Cherokee told his grandson about a battle that goes on inside people.
He said, "My son, the battle is between two wolves inside us all"
"It is a terrible fight and it is between two wolves. One is evil - he is anger, envy, sorrow, regret, greed, arrogance, self-pity, guilt, resentment, inferiority, lies, false pride, superiority, and ego." He continued, "The other is good - he is joy, peace, love, hope, serenity, humility, kindness, benevolence, empathy, generosity, truth, compassion, and faith. The same fight is going on inside you - and inside every other person, too."
The grandson thought about it for a minute and then asked his grandfather, "Which wolf will win?"
The old Cherokee simply replied, "The one you feed".
http://www.psychologymatters.asia/article/65/the-story-of-the-two-wolves-managing-your-thoughts-feelings-and-actions.html
But why do we so easily succumb to feed the evil wolf? Why do we hate and feed it and react hatefull towards others?
why people can hate each other? hatred comes from within the human heart, hatred is made up of dislike, jealousy, envy and selfishness.
many humans are less able to be grateful for the conditions they feel, they always feel less and different from others, they can not accept the difference of their fate so that they arise envy without looking for their own mistakes, or how others can succeed whereas they are not, and in the end they can only hate others only.
it would be wise if we can not only envy or hate others, we better introspection ourselves first, we locate our mistakes that cause us can not succeed, we embrace others to be able to share and give guidance so that we can follow the steps of success they.
my advice we do not easily hate others because we do not have what they have, we just have to be patient, self-introspection and socialize with others in order to achieve the same.