Why do people hurt the righteous?

Some people like to hurt the righteous because they someone is righteous, and someone doing the hurting is evil. A woman got Emmett Till brutally murdered because he’s righteous, and Carolyn the evil one.
Big brothers like to hurt their little brothers because their little brother is righteous, and their big brother the evil one. Girls like to manipulate, and mess with boys because boys are righteous, and girls are evil.

The Bible says, “do not be like Cain. Cain killed Abel because he was righteous, and Cain the evil one.”

Why do people hurt the righteous?
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