Why does Persepolis love the king?

Marji's parents refuse to take Marji to the protests. At the end of every day, Marjane’s parents return from the demonstrations with aches and pains in their bodies. Marjane asks her parents to play the game Monopoly with her but they laugh. In defiance, she tells her parents, “I love the King, he was chosen by God.” She tells them that her teacher, as well as God himself told her this. In addition, she says, it is written in the front of their schoolbooks.