u/Gaara112

Having learned a fair bit about human psychology, extremist factions tend to share a common trait: a deep fear of losing control. Because of this fear, control becomes their primary weapon. It reflects a psychological state where the ego takes over the individual, often leading them, and those around them, toward destructive outcomes.

You can see this pattern on both the far-right and the far-left. When the ego becomes rigid and fragile, it eventually leads to a state where unconscious impulses take over. At that stage, it becomes very difficult for a person to regain balance or sanity.