Jamal and Salim are Muslim. Their family was targeted by an anti-Muslim riot, and Salim is a Muslim name, and I think Salim said "Allah Akbar" once.
Is Latika supposed to be Muslim? She didn't wear a headscarf covering all of her hair, whereas Muslim women in most though not all countries do. On the other hand, there was a romance between Jamal and Latika, when Muslim men are only allowed to marry Abrahamic women.