Short answer: it's basic human nature if you don't specifically work against it. Many people work against it, but not everyone. The ones that do not work against it mostly don't because the environment they grew up in doesn't do this, so they never started working against it. Later in life it's difficult to change and admit you were wrong.
Hating other people is not basic human nature. It's learned behavior.
I mean the specifics like who you hate, in what way, is learned, but the hate itself is basic. You can't tell me hate isn't one of the most basic human emotions.
Short answer: it's basic human nature if you don't specifically work against it. Many people work against it, but not everyone. The ones that do not work against it mostly don't because the environment they grew up in doesn't do this, so they never started working against it. Later in life it's difficult to change and admit you were wrong.
Hating other people is not basic human nature. It's learned behavior.
I mean the specifics like who you hate, in what way, is learned, but the hate itself is basic. You can't tell me hate isn't one of the most basic human emotions.