Why hate others?"

It is acceptable to hate those things that God hates; indeed, this is very much a proof of a right standing with God. “Let those who love the Lord hate evil” (Psalm 97:10a).

However, the hatred that is negative surely has to be that which is directed against others. The Lord mentions hatred in the Sermon on the Mount: “But I tell you that anyone who is angry with his brother will be subject to judgment” (Matthew 5:22). The Lord commands that not only should we be reconciled with our brother before we go before the Lord, but also that we do it quickly (Matthew 5:23-26).

Hatred is a poison that destroys us from within, producing bitterness that eats away at our hearts and minds. This is why the Scriptures tell us not to let a “root of bitterness” spring up in our hearts (Hebrews 12:15).

most of hatred is due to Jealousy which is the most common reason for hating others. Many people do not like other people or anything that is not related to them.

Enmity also is another common reason that forces people to hate. Many people cannot live without an enemy. They find enemies everywhere and select some of them to hate.

Third the concept of Superiority complex. They also disregard others and hate them. But these people become victims of hatred by others. 

this kind or type of hatred is bad   are those who are taught to hate. This is another reason I have observed. People are taught to hate by politicians, communal organizations, and community and even by parents and teachers. 

Finally there is Ignorance which can become a very big problem. If others ignore you and you ignore them people start to hate. Hate is a behavior of people just has in them.

it is a time to change and we can do it let us change;