Fires: Mother Nature or Arson ?

If there is anything that the fires in California taught us during 2018 & 2019 and that would be to not blame Mother Nature for all our woes. Yes, the timing does seem to be aligned with fire season. But, as we saw with the recent legal settlement with PG&E; contributing factors must be taken in to consideration.

I also referenced these reports in my recent research:
Law enforcement agencies across the West Coast have arrested multiple alleged arsonists accused of intentionally setting fires while hundreds of blazes wreak havoc in several states.
https://bluelivesmatter.blue/police-arrest-multiple-suspects-in-connection-with-west-coast-wildfires/
https://kion546.com/news/2020/09/07/woman-accused-of-intentionally-starting-fires-on-highway-101-arrested/

And I can’t help but ask myself – what portion of these fires are being set intentionally for the purposes of obtaining emergency Federal funds to help with their financial woes (Arson)? Giving little consideration to the loss of life or property? And why, would the FBI refute the existence of arsonists? Who are these people and what organizations are they affiliated with?