Some people like confrontations. For some, it is a way of engaging other people, and they don’t seem to know any other ways. It sounds to me that this is how your family is.
I would like to suggest that you try listening. Be warned: listening takes great discipline. What you have to do is tell yourself that your job in this conversation is to fully understand the other person’s point of view. Your job is to get as much information as you can from them that will enable you to understand what they think and how they got to think it.
This means that you can ask questions designed to achieve this goal, but you can not express your own opinion about what they say. For everything that sounds whacko to you, you have to ask enough questions so that they can tell you what you need in order for you to be able to say that you can understand how they came to think that.
This can be pretty difficult to do, but if you stay focused on your goal (to understand them), you can stay on task. The thing is most of us want to hear ourselves talk. We want to engage. We want to fight. We want to win. So we can’t shut ourselves up to listen.
It helps if you are truly interested in the other person’s point of view. Or truly interested in the person. It really helps if you like them.
However, many times, asking questions can be a subversive way of arguing. If you ask questions, sometimes people will stop and listen to themselves and discover, on their own, that what they think is questionable. This doesn’t happen often, but it does happen and is quite rewarding when it does.
But if you don’t like someone, then it’s hard to have the patience. You just want to knock the person on the head, the way a few people want to do to me. Personally, I don’t mind a fair fight. I don’t like it when people start calling names, though. Still, when they call me names, I can respond to the provocation, as I usually do, or I can stop and ask why they think what I say is hogwash. It all depends. If I get angry, which being told I am spouting hogwash usually does to me, I won’t want to love the person and try to understand them. I want to hurt them for hurting me. I forget that I am even hurt, because my anger jumps up so quickly, I don’t even remember it’s because I’ve been hurt.
So here’s another to think about. When people attack in an argument, they probably have been hurt. If you can step back and control your own anger and remember they’ve hurt you, and extend them the courtesy of thinking they may not have meant to do it, then you can give yourself the grace period you need to ask questions. If you ask questions, you can’t argue and you can’t really fight (although there are some people who get angry when you ask questions, too—I guess you can just say you are trying to understand).