Horrible parenting as a mother beats her daughter and finally the daughter tries to fight back. This is why we can't have nice things. Sometimes an old fashioned butt whooping helps, but this is straight up child abuse doing it in public, letting people record it. She probably had her kids when she was still in high school. Generation after generation of horrible parenting causes terrible scores at school and people don't ever do better. They can, but they don't want to.
Keep America Great Or Make It Creepy Like Joe?