He may have an emotional problem, or be a mental case. But his aim is not to explain, protest, find contentment or misbehave. His aim is to force political authority to act as he wants. Method Is Violent. A terrorist uses violence.
Violence keeps getting more dangerous.
Bombs and guns improve. Chemicals, germs and atomic bombs come within reach. As violence keeps getting more dangerous, so does terrorists' potential power. Victim Is Innocent. A terrorist attacks any person or place.