The definition for terrorism is listed below. The only question is if the Mafia/gang's terroristic like practices are sufficiently motivated by political purposes. The more maintained the ethnic identity of the mafia/gang the more likely they are in fact a political movement and therefore terrorists. I think the LA latino gangs are terrorists or will eventually become terrorists.
ter·ror·ism /ˈtɛrəˌrɪzəm/ Pronunciation Key - Show Spelled Pronunciation[ter-uh-riz-uhm] Pronunciation Key - Show IPA Pronunciation
–noun 1. the use of violence and threats to intimidate or coerce, esp. for political purposes.
2. the state of fear and submission produced by terrorism or terrorization.
3. a terroristic method of governing or of resisting a government.
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[Origin: 1785–95; terror + -ism]
Dictionary.com Unabridged (v 1.1)
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2006.
American Heritage Dictionary - Cite This Source ter·ror·ism (těr'ə-rĭz'əm) Pronunciation Key
n. The unlawful use or threatened use of force or violence by a person or an organized group against people or property with the intention of intimidating or coercing societies or governments, often for ideological or political reasons.
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Online Etymology Dictionary - Cite This Source
terrorism
1795, in specific sense of "government intimidation during the Reign of Terror in France" (1793-July 1794), from Fr. terrorisme (1798), from L. terror (see terror).
"If the basis of a popular government in peacetime is virtue, its basis in a time of revolution is virtue and terror -- virtue, without which terror would be barbaric; and terror, without which virtue would be impotent." [Robespierre, speech in Fr. National Convention, 1794]
General sense of "systematic use of terror as a policy" is first recorded in Eng. 1798. Terrorize "coerce or deter by terror" first recorded 1823. Terrorist in the modern sense dates to 1947, especially in reference to Jewish tactics against the British in Palestine -- earlier it was used of extremist revolutionaries in Russia (1866); and Jacobins during the French Revolution (1795) -- from Fr. terroriste. The tendency of one party's terrorist to be another's guerilla or freedom fighter was noted in ref. to the British action in Cyprus (1956) and the war in Rhodesia (1973). The word terrorist has been applied, at least retroactively, to the Maquis resistance in occupied France in World War II (e.g. in the "Spectator," Oct. 20, 1979).
Online Etymology Dictionary, © 2001 Douglas Harper
WordNet - Cite This Source terrorism
noun
the calculated use of violence (or the threat of violence) against civilians in order to attain goals that are political or religious or ideological in nature; this is done through intimidation or coercion or instilling fear