How to understand an Abusive man?

Man is honest, principled, socially respected, and sits at a powerful administrative position. But he is verbally abusive at home and home only. He would verbally abuse wife for small petite things. If she reacts to it or answers back he would beat her up.
He would criticize every little thing of his daughter. With time as the daughter grew older and started to react, he would even verbally abuse her and beat her up. Criticize how big of a failure she is.
He would clearly state "I'm not interested in listening to you". The daughter and mother would do everything to please him still he finds ways to discourage them, find their mistakes, criticize them and tell him how stupid and mindless they are. He is completely aware of what he does but he is not ashamed and completely shuts them down when start showing his mistakes.
He doesn't appreciate their efforts at all. But he pretends to be a peace loving respectful man in public who has bad luck with disappointing wife and kids.
He is a heart patient and he blamed the reason for it happening were his kids. Those kids gave him tension that's why he had a heart attack. Every time a fight breaks he would blame them saying "do you all want me to die, I'm a heart patient" cuz he couldn't handle being blamed. This man also has control issues, extremely proud.
How to understand an Abusive man?
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