Environmental activists who started multiple fires in a effort to reinforce into the general population that "climate change" needs to be taken seriously. They would also be happy with the results of the fire if it destroyed rural county folk living, as many have been conditioned to despise hard working folks. Similar to how antifa goons lit up the countryside in areas where trump supporters lived several years ago. Done because they know they can't pull their bullshit on a armed population. Also, with how hard it would be to find the ones at fault, it would be likely they escape without punishment.