if egregious such conduct warrants placing them in a juvenile home/school where they would receive proper supervision and therapy.
Pass laws to make the parents and/or guardians civilly liable for any damage done to life and property.
If its a one time event, proper discipline works.Lock up all fire starting/combustable materials, especially gasoline or similar liquid fuel.
Pyromania is a treatable mental condition for the young, not so treatable after the age of puberty.
You jumped to lots of conclusions
You aren’t a psychiatrist and you really aren’t this child’s
Laws already exist that hold parents responsible for their child’s actions