United States Law Code U.S. Code Title 22, Ch.38, Para. 2656f(d) defines terrorism
As used in this section—
(1) the term “international terrorism” means terrorism involving citizens or the territory of more than 1 country;
(2) the term “terrorism” means premeditated, politically motivated violence perpetrated against noncombatant targets by subnational groups or clandestine agents;
(3) the term “terrorist group” means any group, or which has significant subgroups which practice, international terrorism;
(4) the terms “territory” and “territory of the country” mean the land, waters, and airspace of the country; and
(5) the terms “terrorist sanctuary” and “sanctuary” mean an area in the territory of the country—
(A) that is used by a terrorist or terrorist organization—
(i) to carry out terrorist activities, including training, fundraising, financing, and recruitment; or
(ii) as a transit point; and
(B) the government of which expressly consents to, or with knowledge, allows, tolerates, or disregards such use of its territory and is not subject to a determination under—
(i) section 2405(j)(1)(A) of the Appendix to title 50;
(ii) section 2371 (a) of this title; or
(iii) section 2780 (d) of this title.
Islamic Jihad leader Abu Ibrahim:
"What we seek with our rockets is not to kill Israelis, but to maintain a balance of terror... The fact that a million Israelis were stuck inside shelters and suffered as as our people do is more important for us than deaths."
Its all about terrorizing the Israeli people.
From the Daily Star
Abu Ibrahim warned that the Brigades had weapons that could hit beyond the town of Ashdod, which lies some 35 kilometres (20 miles) north of Gaza.
"If the occupation targets any leader of any Palestinian group whatsoever or any citizen, the Brigades will respond with force and expand the reach of the response beyond Ashdod," he said.
The group possessed "thousands" of rockets and had expanded its arsenal by exploiting "the opportunities offered by the (Arab) revolutions, particularly the fall of the Egyptian regime," he added.
Still, he said, "it is not easy to transport sophisticated weapons into Gaza," adding that 70 percent of its rockets "are made locally by a specialised section."
"We now have guided missiles similar to Grads and we used them during the last conflict."
Abu Ibrahim also denied tensions with Hamas, which rules Gaza and sought a quick end to the latest conflict and kept its fighters out of the battle, saying: "The Brigades operate with full freedom."
And he denied "any coordination with any outside group, in Sinai or elsewhere." But he acknowledged the group receives "fundamental support" from Lebanon's Hezbollah group, saying it had trained thousands of Brigades fighters.