When my niece Kelly was four years old, the family took her to my nephew's high school football game. She didn't understand much of what was going on, but she asked questions.
"My brother's team is the blue team, right?"
"Yes Kelly," grandpa nodded distractedly.
She thought about this.
"The blue team is the good team right?"
"Yes Kelly," grandpa nodded.
"The red is the bad team right?"
"Yes Kelly," grandpa nodded.
She pondered this. Then she had an epiphany. Her face lit up.
"We should kill them! It would be fun!"