It's part of human nature to feel these emotions. Anger is a force which pushes us to action, to amend what we don't like or perceive wrong. Hate is a maximum of dislike spectrum. It also helps us to make choices. It is also a part of feeling system that pushes us to action. Actually without any feelings, without feeling any emotions, we would do nothing in life. We wouldn't care, we wouldn't act or move, we wouldn't eat, or have kids, or decide anything.
There are rare medical case of people losing emotions, by injury. They don't care for anything anymore, they can't even decide what time and date make the appointment for to the doctor. Weird stuff.