What makes people hate each other?

Ego is the start of it!!

The way people behave, makes me 'dislike' people.

You have to do something really morally wrong to be 'hated' by me.

Here's a list that I found on Yahoo! Answers that explains what I dislike about people's behaviour perfectly.

Low Emotional Intelligence

Being easily angered.

Unhealthy-Ego

An overly high opinion of oneself. A person's sense of self-esteem or self-importance.

Selfish

Lacking consideration for others; concerned chiefly with one's own personal profit or pleasure

Narrow Minded

Not willing to listen to or tolerate other people's views; prejudiced.

Small-Minded

Having or showing rigid opinions or a narrow outlook; petty.

Simple-Minded

Having or showing a low level of intelligence.

Single-Minded

Having or concentrating on only one aim or purpose.

Ignorant

Lacking knowledge, information or awareness in general; uneducated or unsophisticated.

Arrogant

Having or revealing an exaggerated sense of one's own importance or abilities.

Some people hate each other because they feel like they have been mistreated by the other. Once one person does something against the other, this offends, upsets or makes the other person angry. This leads them to act badly against the person who did it to them for revenge. This causes the first person to become offended, upset or angry towards the other.

This anger between them makes them hate each other.

Interesting question. I think it deserves a star!

In 2011! Backwardness!They are still living in the dark ages

For a variety of reasons people hate each other.

Psycho.

covetousness and ignorance.

listening to BS in the church and media.