All human-caused fires aren't arson, most of these are usually negligence (source: worked in operations at fire service). Not discounting the risk of arson but I find it is used a lot to distract from conditions making the forests a tinder box.
I have no way to evaluate the veracity of this site, but https://inspain.news/spains-wildfire-tragedy-now-has-a-human... says:
> In some cases, arson is linked to economic gain: land clearance, insurance fraud, or disputes over grazing rights. Others are sparked by resentment towards environmental restrictions.
Is was a possibility in the past, but the current situation is different. More often than not, when we examine the coordinated internet rage bait about sinister projects to build in the burnt areas (solar farms, AI plants, etc...) this projects don't exist really. Houses will be simply rebuilt by their owners, no soil change expected.
More often than not, the people starting the rage bait post from a different country also.
And not all crimes are solved. Some on the 'negligence', 'natural causes' and 'unknown' could be also still arson on disguise.
Ukraine's treat to start bombing 'Ozon' ware stores and to finish with 'Wildberries' actual misery, could do more for stopping this wildfire waves than any of the current measures deployed.