Responses
Actually if she was deaf and his son was the only remaining there he would hate his son too.
I've read a spoiler in which it says that the reason for his hatred toward FL was because he had a great position because of his wife but she died so he lost everything. But I still don't understand why her thought, he is just psychopathic. What a pity psychiatric hospital weren't a thing at this time, it would have help the society for those madly insane people.
I think the reason the father hates the daughter and thinks she's cursed is because she comes out unharmed during the accident.
I thought the father would blame the son because the mother died protecting him.
(Of course the mother's death was neither their fault.)