Hate and Love

Why did people hated someone? Basically if that someone did something wrong on him/ her. If that person got jealous about what the other has more than what they've got. There's saying same feather pluck together they just like who are the same as them and hate those who are not. They are so denial in the fact that, there are also so many people has more advantages than them. What are the advantages?  Oh.. for example the neighbour has a nice house, clothes, cars, toys, etc what the world can give. The same also if someone they know that much more brilliant and know so many things than them. The point is, jealousy is a combination of hate so many didn't notice that they've got that feeling. What about love? Love is unconditional what is unconditional?  True love that don't have agenda like, you can better be good to me so that I will love you, better listen always what I'm going to say, like all that I  like, please me and praise me always. That is some kind of a selfish behavior. That's why for me..?  hate me if you want, Love me if you can.