How would you react to a friend who deliberately set fire to your home ?

Would your reaction be different if you were to later learn that your friend has been diagnosed with pyromania - the mental health disorder having caused him to repeatedly set fire to several smaller structures such as garden sheds, piles of branches from trees, before setting fire to your house with no malice of intent but a compulsion which he could not tesist, even though he was aware of rights and wrongs at the time ?