Objectivity refers to the ability to be unbiased when trying to achieve a goal through one’s actions. While I haven't personally focused on being objective during disputes, it seems crucial to listen to both sides thoroughly without appearing to favor one over the other. A neutral, third-party approach is ideal. While some individuals can be truly objective, many fail, especially if personal connections or biases come into play. Personally, I don't encounter many who maintain true objectivity.
(a) angry is the word you are looking for. Hope this information aids you.