All perfect praise be to Allaah, The Lord of the Worlds. I testify that there is none worthy of worship except Allaah, and that Muhammad is His slave and Messenger. We ask Allaah to exalt his mention as well as that of his family and all his companions.
Allaah legislated marriage in order to achieve high objectives, the most important of which is stability within the family, so that it can instill the correct and real meaning of worship to Allaah Alone, and lead to population the Earth. The most important way to achieve this is for the husband and wife to observe their obligations towards each other and fulfil the rights that Allaah has ordered them to fulfil. Allaah says (which means): {And women shall have rights similar to the rights against them, according to what is equitable.}[2:228]. There is no doubt that the arguments that your parents are having is a great affliction, so we advise you to be patient and fear Allaah in their regard and advise them. You can also seek the help of righteous and pious people of your family and others in order to reconcile them. If they succeed to do so then all perfect praise be to Allaah, otherwise even if your father is mistreating your mother, you still have to be kind and dutiful to him. Moreover, it is not permissible for your brothers to take your mother away from the house of your father without his permission because that could worsen the problem. However, it is permissible for your mother, if she fears any harm, to consult an Islamic centre or organization to look into the matter and remove the harm from her.
Allaah knows best.