Children Of Divorced Parents Support Group
This community is for the children of divorce, both for adult children who have lived through a divorce as well as parents concerned about the effects of divorce on their children. Share your story and get advice in this support group, where there are others going through similar challenges.

http://unityandstruggle.org/wp-content/uploads/2016/04/Lundy_Why-does-he-do-that.pdf
My best advice, don't engage. Walk away if you can. If you can't, reflect his feelings back "you are angry at mom."
Your sister is learning to bond with her father because he's the strong one. There's nothing that you can do to stop it. But it might help to understand and know that she's the one that will be hurt the most in the long run, especially if she marries a man with the attitudes of your father.
My little adopted sisters still live with my Dad and step-mom, and they go through something similar to you and your siblings. My siblings and I have confronted our Dad about his anger issues, but it doesn't seem like it has helped as much as we were hoping for.
So I have had to think about ways to help my little sisters through what they are going through. I have come up with two things. First, my siblings and I need to cultivate a strong and supportive relationship with our little sisters so that they have a loving and healing relationship to help them grow. Second, my little sisters need to reach out to a school counselor so that they can get some emotional support and advocacy.
My Dad and step-mom are not giving my little sisters that loving and healing support they need, but they need to get it from somewhere, and one of the ways to get that support is from us. So my siblings and I become supportive to our little sisters by cultivating strong friendships with them. We have fun with them, listen to them when they have important things to say, playfully tease each other, play games, and anything else to strengthen that bond of love and friendship. And they love it; they look forward to when we can spend time together.
Seeking out a counselor at school may help my little sisters because the counselors are there to help young adults and children going through family problems. The counselor helps them to find ways to grow and deal with the emotional pain they are experiencing. The counselor can also advocate for them if it is necessary.
If you are feeling like the situation with your parents is too much to endure, then I would like to say this to you; you can get through it. You can get through it by cultivating supportive relationships with your older sister and your younger sister and brother. You four are in this together. You four can become good friends who support each other through what you go through with your Dad. If you endure it alone, then this is hard. But if you endure it together by being a support to each other, then the pain will be lessened and become more endurable. Think about it, what if you could look at your sisters and brother and show by eye contact or by the words you say or by the hug you give them that you trust them and love them and you know what they are going through – do you know how much this could help them? And if they did the same to you, do you know how happy or comforted this would make you feel?
But what if you don’t have a good or supportive relationship with your siblings? What if you have all felt too broken and isolated from each other to have good relationships? It doesn’t have to be like that from now on. You can make the effort to cultivate a strong relationship with your siblings. It requires some effort to do this, and right now this sort of effort might seem like too much. But this effort of giving yourself like this not only benefits them, but it benefits you too. Think about what your relationships can become if now you labor to make them stronger. I think it’s worth it.
Finally, it may also be beneficial for you all to make a visit to the school counselor so that you can be heard and get more direction. I think it would be comforting to you and your siblings to get the positive feedback that a counselor gives.