We need to distinguish the person from their actions. We can condemn their behavior, but we should not dismiss the person. We should not judge the person as a whole by their behavior in any given moment but take into account all the factors affecting them over time. There is more to a person than just the particular action that we are witnessing and disliking. If we are willing to look, we can always find another aspect of them that we are able to connect to and work with.
