It’s straight out of Kevin MacDonald’s work about altruistic punishment, Northwest European egalitarian individualists needing an “overarching moral system” in order to cooperate compared to Eastern clan-based values where family and tribe come before abstract moral concerns.
In Confucius’ Analects, we are told of a man called Kung the Upright whose father stole a sheep. Kung testifies against his father. The Duke, as he reports the case to Confucius, is proud of what he considers to be Kung’s uprightness.
But Confucius disagrees, saying that in his country, the son who would protect his father is the one considered upright.
“My brother and I against my cousin, my cousins and I against the world.”