Sake of friendship
When people are arguing neither one is listening to the core of the problem between the spaces of their hurt and insecurities masked in anger. As the dispute escalates words may be said that cannot be unheard, actions may take place that cannot be undone. When we work to be understanding, we're able to forgive others, and forgive ourselves.
So when we are embracing anger, instead of forgiveness; judgment, instead of understanding; pain, instead of healing; ego, instead of truth; take a breath, step back and remember that we are all functioning from our own level of consciousness. All of us are reacting from our life experienced-based interpretation of the given situation. When we take a moment to acknowledge this we can get ourselves back on track, for the sake of our friendship/relationships and also our own peace of mind.