I have long been annoyed by the current trend that discussions are fights that can be lost or won. In my eyes, that is the cause of the terrible discussion culture we see online. Discussing about a thing is a collaborative process where both parties try to find a solution to a common problem or collectively try to deepen their knowledge.
However, many people go into a discussion with a fixed mindset and do not even try to see the other's viewpoint as valid. This makes me sad since this is where people loose their sense of reality and sometimes drift off into extremist views.