"Violence for violence’s sake, violence for revenge, or violence simply in the course of criminal acts (e.g., murder, rape, robbery, assault, etc.) is not "terrorism" unless its use is intended to attain political, religious, or ideological goals. This point is crucial in understanding terrorism because unless one understands terrorism one cannot fight it effectively. "Terror" is great fright or great fear—terrorism is something different"
An ideological, or political goal... mixed with violence directed against the public, or civilians is terrorism.