An independent terrorist actor works outside a command structure, unaccountable to the claimed collective cause of a group. They are often motivated by personal gain or vendetta. Examples are: Vendetta is a term for blood feud where relatives of someone who have been killed or otherwise wronged seek vengeance trying to kill or otherwise punish the ones responsible or their relatives. ...
The radical extremist Eric Robert Rudolph, who launched a series of attacks against civilians in the American south.
Baruch Goldstein, a Jewish extremist who opened fire inside the Cave of the Patriarchs in Hebron, killing 29 people. Although he was affiliated with Kach, Goldstein acted on his own. In response, the Israeli government condemned the act, outlawed Kach and compensated the victims.
Those accused of being "terrorists" rarely identify themselves as such, and instead typically use terms that refer to their ideological or ethnic struggle, such as: separatist, freedom fighter, liberator, revolutionary, vigilante, militant, paramilitary, guerrilla, rebel, jihadi or mujaheddin, or fedayeen.
For instance, the FBI asserts that for an act to be considered terrorist, it must be perpetrated by a like-minded group, and not a single individual acting alone.
Terrorists also attack national symbols to show their power and to shake the foundation of the country or society they are opposed to.