How can people hate so easily?

I don't understand how humans can hate others so easily just because they're different. We're all humans, don't we all deserve some sort of respect or acceptance?

Yes, we all deserve to be respected by others. Although, not everyone gets that respect. Some respect is earned.
Hate is something emotional, and you can't hate someone for no reason. But if someone has done you wrong repeatedly over a period of time, it will grow from discontent, to anger, and then finally to hate.

I try not to judge peope but we all do it. One absolute thing I do not do however is hate. I hate no one that I do not know. I've never liked to hear someone say, "Oh her I hate her!" because the person saying that most likely doesn't know them or about their life. That's why I think people hate, people hate because of their ignorance of the person hated on. Also I think hating someone can kind of be a peer pressure or heard mentality. Example you get a group of kids hating on this other kid no one is going to want to step up and say "hey give the kid a chance!"

Everyone deserves a chance, no matter who they are or how they look. Treat others as you want to be treated.