A family member of mine died in a house fire as well, and her death prompted the development of new insulation safety standards in Germany (this being a number of decades ago). Knowing what led to this fire is of interest to me.
I've edited my grandparent comment to remove the link to his Wikipedia page, and default to the heavy.com link posted above.
You're right — it is helpful to know what happened. It's tragic to hear of Tony's death, and it's even more disquieting to speculate about the causes. Arson/murder paints the event in a very different light from a mechanical malfunction or, god forbid, suicide. And, as you mentioned, fire deaths are exceedingly rare, so the whole matter is cloaked in mystery.
I'm pretty shocked to hear of Tony's passing, as I was also very moved by his ethos and writings. That he died in a fire is all the more shocking — a death from cancer or something similar would be easier to accept. Perhaps this is because cancer and serious illness feels almost inevitable, and this doesn't.