Even if his views are often portrayed otherwise, Gandhi emphatically agrees that it’s legitimate to use force to stop greater violence—which includes necessary self-defense. In this situation, the parent is decreasing the overall amount of violence by saving their child from the fire, even if this requires using a small amount of force. So passive resistance in no way means non-interference: on the contrary, it means actively interfering with the workings of evil forces, people, and institutions.