[lesostep]

> Having some degree of personal experience with this situation myself, I don't see why you'd ever sever a relationship over something like this

The reasons were explicitly given in a written piece: the daughter severed herself because it hurt her when her dad insisted that she was lying to him. His wive was hurt because it is very hard to plan your retirement with someone who is convinced that the world would change in a year.

Note that the son stayed connected and the actions of his dad never explicitly hurt him. Made him feel sad and disconnected, but never hurt.

The problem wasn't that the others never accepted his believes or weren't considerate of them; the problem was explicitly the dad who decided that he knew better about his daughter sexuality and shared house budget, without taking anyone views on the things the rightfully belonged to them (their thoughts and the money that partially belonged to the wife).

It is hard not to sever relationship with a person when they decide that they have a right to choose for you. Either you pretend that they have this power over you or hurt them when you make your own choices, making them feel betrayed and powerless.