He should be tried and executed. Burned at the stake. People DIED and homes DESTROYED.
Not to mention people hundreds or even thousands of miles away who may suffer grievous, even fatal illness, contracted from particulate matter in wildfire smoke, that containing VOCs and carcinogens. These firebugs need to be deterred with capital punishment, and not encouraged by light sentences and global warming hype (which serves to stoke their pyrophilia as well as confidence that their fires will be blamed on global warming rather than their acts).