The kid is angry. Zain is his name, and at the start of “Capernaum” he’s suing his parents for having brought him into the world. In court, in handcuffs, in Beirut, he’s charged with stabbing a man.

Nadine Labaki‘s “Capernaum,” the winner of the Jury Prize at the Cannes Film Festival, has been selected by Lebanon as its candidate for the upcoming foreign-language Oscar race. “Capernaum,” which ...