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Your approach to an extent may relate to what your husband does. IF he continues to abuse you, the best and idealistic option would be to leave. Otherwise, you would want to seek professional help ex: marital therapy. He would have to be willing to work on his temper. Whether you're argumentative or not should not matter. What matters is his abuse and lack of self control. When he is trying to argue with you, let him know that you will talk to him when he's calm. Do not engage in a power struggle even if you know for a fact that you're correct. Choose your battles. Do you want to prove him wrong or do you want to assist him in staying calm?
If other family members are aware of his anger problem, you may want to have an in home intervention (where you gather close family members and confront him on his behavior and how it is affecting you and your son)
If he is able to talk about his triggers (when he is not angry), find some time to go over facts and see if he would take responsibility for his actions. If he denies and refuses to accept your feedback, there is not much you can do to "make him" do anything. He has to at least acknowledge his behavior as harmful to the marriage and your son.